My trident case got here in the mail yesterday. I like it, and for the most part, its made well, but it really isnt worth $25. It is really just a silicon sleeve like the ones you can get for $2 and an injection-molded plastic back that clips onto it. The screen protector it comes with doesn't have a cutout for the proximity sensor. If you're one of the people that has issues with the screen not coming back on after a call, putting more stuff over the proximity sensor probably won't help you any.
Anyway, I overpaid for one and I have it now, so there not much I can do about it. I do like the added bulk it gives the phone. It feels like theres something to hold onto with my hand now, instead of just a the tips of my fingers. The dimensions of the phone with the trident case are 2.735 x 4.844 x 0.600 inches. I don't have a scale to measure the weight. The two parts to the case fit the phone well, and they fit together well. Sometimes its almost too well.
I do a lot of stuff to the phone that it wasn't meant to be used for, and end up having to pull the battery. The act of taking each part of this case off, then taking the phone apart, pulling the battery, and putting it all back together feels like that scene in Forest Gump when they're sitting around in the army taking apart their guns and putting them back together again. If you only use the phone like it was meant to be used, and never have to pull the battery, then that probably doesn't matter.