looking at a sight from trophyridge called the mantice just wondering how good they are?

I have 2, I have the Guide Series V-drive Mantis and the Other Mantis with out the V-drive. The V-drive is a good sight if you plan to use it on the ground also, just too many moving parts, the other Mantis is ,IMO the better if you are just hunting from elevated stands like I do.

Thanks for the help! benfromva