We had a capsule and recently had to upgrade to a convertible car seat so that Connor could stay rear facing....the capsule went to 12 kilos and he was around the 9 kilo mark but outgrew it length wise.....I think the max height for the capsules is around 70cms or a just a bit over that. So to keep him rearfacing we have had to get the convertible seat which he can stay rear facing in height wise for much longer...he is 9.5 kilos at 12 months and 75cms and height/weight wise might even get to 2 years before turning.

So knowing what happened to us, if you don't intend to use the capsule as a travel system I probably wouldn't buy one... if you want to rear face till the maximum weight you will still need a second seat down the track.....unless you have short kids, in which case the capsule might work.

Hope that makes sense!