My son is thrilled with the system he purchased. As a certified diver, he finds the SMACO scuba tank to be the perfect system, which allows him to alternate between snorkeling and longer underwater treasure searching while in shallow water. Due to the tank O2 capacity it is not intended for long term underwater diving, but it does allow a treasure hunter to stay on the bottom long enough to utilize a metal detector or search an area more thoroughly.Highly recommend for anyone certified in diving in areas bulky tank systems are not needed.***however, you will need to rent a tank if you plan to utilize the system longer then 10min. (he leaves the O2 tank on dry land and refills when he returns from searching or attaches it to a paddle board) This method is easier then the "bike pump" style refill system and less expensive then the "electrical pump".Novice diver beware - you Can Not use just any system to refill the tank. It must be a refill system that is specifically designed to refill O2 tanks. (common household bike pumps and air compressors are dangerous)If you treat it like a toy, it will last like a toy. I recommend finding a padded case or backpack (old school pack is what we use) to store it and transporting. I greased the o-rings with gasket grease, as they were very dry when I took them out of the packaging.When bringing it to a dive shop to get filled, place the tank in the refrigerator before hand so that it cools down. When it is getting filled, it will heat up quite a bit. Otherwise, you won't have a full 3K psi in the tank when it cools. (so instead of 10min of air time, you will likely only have 6-8min)... No way is a full size adult getting 15min of air from this thing. This is for very short dives in shallow areas (20ft or less). But is is helpful when practicing and light activity. If you are expecting something to last more than 10min, you need to look at a different product.Getting a tank that is easily visible (in case you have to drop it and head to the surface) is good idea.My dad loves sailing so I got him this for one of his trips. Not only did he use it to scuba dive in the middle of the ocean, he also used it to fix the engine while in the middle of nowhere. This can make trips better or be a life saver!This was a gift for my Grandson. I need contact information for the pump. The pressure gage doesn’t work and the lube oil container was empty. Spilled in box. Please send contact info for air pump Thank youI got this as a fun thing to do on vacation to florida, the tank itself is really easy to figure out and use as someone who has never dived before, with a full tank I got about 8 minutes underwater, which was still really cool. I used the manual pump to fill the tank, which took quite a while, If you continuously pumped it without stopping it would probably take about 1 and a half hours, but it's a workout. I highly suggest you also buy a weight belt because wearing this tank made me float, also if you have the money, buy an air compressor.NEW REVIEWAfter receiving a defective unit the company sent out a new one . The new tank works great !The worked with me until the issue was resolved and stands by its product!Bought this for my son to use in the pool. He gets about 8 - 9 minutes of air per full tank. That’s only if he didn’t take any break. He loves it so much that we bought a second tank to extend the time.We bought a high pressure compressor off Amazon so we could fill on our own as it would get expensive in a hurry if you had to pay someone else for each refill. Each refill takes about 30 - 40 minutes. Well worth it!So far so good. A little hard to put the air in with a bike pump. Need to invest in a compressor to make it go faster.Non compratelo assolutamente, è quanto di più pericoloso possa esistere. Ha filettature non standard e soprattutto nel 90% dei diving non lo ricaricano. Si può salvare la bombola andando a inserire un rubinetto standard ma allora il gioco non vale la candela. L’erogatore fa schifo è di una plasticaccia scadente. Non mi sono fidato a usarlo nemmeno a 30 cm di profondità. E in ogni caso, a secco l’aria dura 4/5 minuti. Inoltre, in Italia una cosa del genere è illegale. Restituito subito dopo averlo aperto e caricatobonjour , bonjour , bien qu' en apparence de très bonne qualité il s'avère impossible de rester 15 a 20 mn sous l'eau avec cet équipement comme l'indique le commentaire , pour ma part c'est 4 minutes a1 mètre de fond .ancien plongeur j ai fait quelques calculs rapide et la réalité avec 1 litre a 200 bars est bien de 4 a 5 minutes et non 15 a 20 !Lega desarmado, pero es un procedimiento fácil y rápido. El aspecto general es de calidad. Una carga a 200 bar. da para unos 10 minutos, pero es suficiente para mis propósitos.Matériel de bonne qualité. Il faut prendre en compte qu'il faut également acheter un compresseur spécifique qui coûte env. 250€. Le compresseur de voiture habituel n'est pas adapté pour remplir ces bouteilles puisqu'il faut 300bar ou un compresseur habituel est à env. 10bar. La pompe manuel est également inadaptée puisque beaucoup trop long et épuisant. J'ai dépassé le délai de retour de quelques jours donc pas possible de le retourner.Dieses Tauchset ist gut verarbeitet und funktioniert wie es soll. Die Tasche eignet sich aber nur bedingt für den Transport mit montierter 1. Stufe, da die Flasche dann quer in die Tasche gelegt werden muss. Das Set ist relativ neutral unter Wasser. Zusätzliche Gewichte waren nicht notwendig. Das Set eignet sich vollständig für einen kurzen Tauchgang, ist aber nur Personen zu empfehlen, die einen entsprechenden Tauchschein besitzen. Man könnte damit auch tief tauchen, doch der Luftvorrat ist bei dieser Flaschengröße sehr begrenzt.