i have two kids - a 3.5 year old and 3 month old - one in a front facing 'booster', the other in rear facing cradle.
they are both easy to get in out due to the large opening of the doors - obviously not as easy as a 4 door - being a short **** i can actually stand in the rear footwell (not upright - i am not THAT short!!!) while putting the older son in.
both seats have plenty of space - are not squashed in.
don't think i would want to do as my main car tho - OK for occassional, once a week use, not daily.
bodykits - dunno - guess ebay - seen a couple although one clearly didn't have the correct side bits (one was shorter than the other!)