We hired a capsule. I took it out of the car twice in the 6 months we had it - once to get baby off to sleep before we got in the car, and once when she was already asleep - she woke up. We have such a wakeful baby, that it was a total waste. Also, in the capsule she was screaming in the car, but when we swapped her into the rear facing convertible seat, she was in love, and is now super happy in the car. Far more likely to fall asleep too, and i have had better luck transferring her from the new seat than the old capsule.

So for us, and how often we use our car, the capsule really wasn't worth it.
This was us exactly too. DD2 hated the capsule. I thought it would make things easier for us but nope. She hardly ever feel asleep in it and if she did and I tried taking it out she would wake up and she never liked sitting in it when it was not in the car. I hired it for 6 months and by 4 months I took it out and put a rear facing seat in and she loves it.