Of all the gun shaped containers for the wii remote I have tried, this is definitely the best looking and possibly the most solidly built.
The trigger movement feels right.
The grip is firm and pleasant, with a groove in the back to allow for the nunchuck cord, should you use it. The gun itself does not house the nunchuck and you will have to hold it with the other hand.
Not that you will want to, because the only problem with this gun is that as big as it is, it is somewhat unbalanced with all of the weight of the remote falling in front of your hand, and you will probably wield it two handed.
This hardly improves accuracy, as the manufacturer claims.
It is not a real problem per se, but the tip will be shaking a little as you shoot, and if the game you're playing has any action mapped to the remote shaking motion you might be triggering it more often than you'd like to.
This is a real issue with the very game this gun was made for, House of the Dead Overkill, which has a too sensitive shaking reload action.
It is definitely the game's fault, not the gun's, as it manifests itself even with the bare remote, but this gun makes it worse.
I recommend this gun for many shooting games on the Wii, as it is a great product of its kind, but I suggest you don't use it with those games that implement motion sensing superficially.