I got the Tango TRX about a week ago. I'm liking it so far.
I keep it at the head of the bed. Have not paired it with the iPhone or iPad, since I can just plug them in. It's become my standard overnight charge station for the iPhone; even works with my (not terribly thick) cases (both iPhone and iPad). Rubber adaptors for the bare naked devices included.
I have paired it (bluetooth) with the iMac and it works fine; though it took a little fiddling to figure out how to get the volume level up. This way I can get to my entire music library on the iMac and use the included remote to control volume or next song. Or I can use the Remote app on the iPhone or iPad for real control.
Sound quality is probably not up to audiophile specs, but good enough for me. Plenty loud enough for my RV or a small to medium room.
Update: Paired it with the iPad. It's as easy as bluetooth pairing gets and worked fine.