I live in an apartment, so getting a programmable remote was not possible, I need to use the one the building supplies. It's about the size of a cigarette packet, with just one button.
I keep it in the right hand lower pocket of my jacket and can push the button through the pocket, without having to get the thing out, or even open the pocket. Gloves or no gloves, works every time and can be done whilst moving using the rear brake and clutch.
Easier than any high tech gismo attached to the bike IMHO.
Mick