We bought a Babylove 0-4 used it 3 babies so far, it also is a good size so they can stay in it until ythye are big enough to go into a booster seat we found we got until around 3 years in it. Adjustment is quick and easy, a one strap pull down, or lift up...we found we had the problem of being to upright as well, it because of the slope in the seat, we use a rolled up towel underneath to lift it a bit (I'm not sure if that would effect the safety of the seat, if you consider doing it you might want to ask around?? we can't see any reason why it would, plus bub is in a much better safer looking postion, rather than head slunped forward)
P.S. I hate our booster seats, they looked fantastic , with loads of adjustment, bought 2 the same and they are just awful...I here you on Safe and Sound. I must complain, but sounds like I should'nt expect much help.