I tried a bluetooth adapter on my pi2 (hoping to use my existing apple bluebooth keyboard) . Couldn't get it to work properly.
Now I simply use a Logitech K400 wireless keyboard. It's not as slim as a remote, but it shows up to the pi as a regular keyboard/mouse device, so it works in everything I tried, even in the berryboot's boot menu. If I ever repurpose the pi for something else, having a wireless keyboard would be useful too.