I initially planned to get the one from Vello, but ended up getting the Phottix Aion. It's as good as the hähnel Giga T Pro II in terms of functionality, features. I may return the Aion and get the Giga T Pro II, but not sure yet. I personally didnt like the buttons on the Aion, and that's my only gripe. The Aion remote is big (5 inches long), fits in your hand nicely. But the smaller form factor of the Giga is enticing if you want something smaller in your hand. Note that Aion uses AAA batteries, while a remote like the Giga uses CR2 batteries. You can't go wrong with either if you are looking to do time lapse, program your own intervalometer, etc. If you are just looking for a simple wireless shutter release, then these might be an overkill.