Went to the movies tonight (Big Hero 6—seems like I end up seeing more kids' movies than adults' movies lately) and experienced the overstuffed, reclining seats at the AMC Assembly Row theater. I have mixed feelings about them. There's the obvious danger of falling asleep; I didn't, but it's easy to imagine it happening if one was tired.
Also, my legs started to get crampy about halfway through the movie. I don't know if it's just because they were horizontal instead of vertical (being supported by the lower portion of the seat that unfolds as it reclines) or if it was a circulation thing, like what can happen on long plane flights. Overall I think I prefer the seats a bit further back in the theaters that are still thickly padded but don't recline.