I ordered this to put inside a real air bed top mattress because the air mattresses were leaking and I was sick of it... and cannot afford to purchase a whole new king size bed set...
I was counting on it HOLDING AIR for extended periods of time as it is zipped inside of a mattress form with fitted foam. It does for the most part, but I keep the inflator handy. I think it slowly loses SOME air over a week or so, but I'm not sure because of the next reason.
In order to be FIRM, I have to inflate this more for one person than two. Since my other half is an over the road trucker, I'm alone much of the time and have to put more air in it when I'm alone, and let a tiny bit out when it's the two of us. We are each just over 200 lbs each, so it's not compensating for 'huge' people... and it's much better with two people than one as the air distribution is better.
Otherwise, i'd say that this is a good solution and holds air in the long term much better than the one's we use for real camping. You really NEED THE QUICK PUMP though due to the nature of the inflator valve. I was not planning on buying that as I have a rechargable pump for other mattress' but there is no way to get this inflated FIRM without the pump for this air mattress.
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