We got the S&S Unity capsule for DS for the reasons others have talked about. I found it great, but did wish that I had of spent a bit extra and bought one the one that fitted on my bugaboo. When DS was 6 months PIL wanted to buy us a car seat so we got the S&S Meridian. TBH DS could've stayed in the caspule longer (he's 13 months and not yet 12kgs, but would be a bit of squish anyway). We sold our capsule on ebay, because next time round I want one that fits the pram, we got $210 for it and I think we only paid about $260 or something, so for us it worked out cheaper than renting it.