I loved having the capsule, more for ease of placing DS in it. It was good to be able to take him out when he was asleep, and only slightly disturb him moving him to his usual sleeping place (bassinette in the early days). I will use one again for the next bub not just for ease of use, but also because I find them much more stable than a rear facing car seat (which I have used).
I hired mine from the council and it came with a new insert etc.