Keep in mind that the Sentry product in question offers no fire protection; it's not fire resistant at all. There's nothing wrong with that as long as you know that it's true and use the product accordingly.
Also, if bolted in, these safes offer some theft protection. The average residential burgler isn't going to try and open one of these. He hasn't got the time or the tools with him. But, a burgler who's willing to spent ten or fifteen minutes and who comes with a heavy ax or a power saw will have to problem with this thing. So, again, this isn't a problem as long as a) you do bolt the safe in, and b) you simply realize that this thing is not a high-security safe and use it accordingly.
These things are great for child proofing your guns which is a responsibility of any gun owner who ever has any children in his house even if only occational visitors. These things are also great in that they will stop the average residential burgler from making off with your guns which is, I think, also a responsibility of any gun owner.