I did LOADS of research and try outs whilst my other half was pregnant and I ended up with a mama and papa unit (will update when I remember what model it was) one I bought is nice and slim I never used it in my zed as I coyldnt turn off the airbags and didn't wanna risk anything, but the seats in my vxr corsa are even more bolstered / deep than the msport seats, and fit very nicely. The base is isofix AND seatbelt compatible. I really would recommend it as it is very well made, and and very easy to move from car to car as well. Fitting and removing the seat from the base is simple too; very important when you don't want to disturb sleeping baby. My little boy has just outgrown this in the last couple months. It's suitable from birth to approx 9/12 month. base cost approx 130 quid and the seat about 110. The seat forms part of a travel system ie, pushchair chasis, car seat and stroller that's all interchangeable. This seat is compatible with a couple different chasis'. I'll take photos of the base in situ soon and upload asap.