The only problem I have with the safe, and it's going to be the same problem for almost every other safe in the same price range, is that it is not using a UL rated lock.
This feature alone can make a major difference during a very simple amateur attack. These safes not using UL rated locks can be opened very quickly by attacking the lock itself with basic tools. Some of these non rated locks are also easily bypassed without leaving any signs of entry, with details shown on a variety of Youtube videos.
Nothing will keep out a pro,
There are safes that will keep out a pro, but pros aren't usually breaking into gun safes in people's homes.
What we are usually looking at is amateurs, and this is where safe construction is important, if the amateur decides to attack the safe. There are safes that will keep an amateur out for 30 seconds, and safes that will keep an amateur out forever. You have to decide for yourself what you're looking to accomplish.
Personally, I'd avoid the safes that would only last seconds or a few minutes against a moron with basic tools. Even though the odds are against an attack on the safe, the possibility does exist. You're just living with a false sense of security if that ever happens.