I had the Babylove tandem lite and while DD1 seemed happy and comfortable in the front in the shop, in reality she hated it. The seat is quite short and she seemed to almost slide off it.

I then went and bought the P&T. Go with your gut - I hated it to look at, bought it because everyone else had it so it had to be good (!!) and regret buying it ever since.

I now have the City Mini Jogger that lives in my car (I have a big double Valco for serious walks around home). It is absolutely brilliant. Both my girls are really comfortable, its light and easy as pie to fold. It fits into the boot of my DH's Lancer Coupe, which has a CD stacker taking up a lot of space, so it should be ok in most cars. It folds very flat, but not narrow if that makes sense. It is really easy to steer and get around shops - it is only slightly wider than my single Mountain Buggy.

FWIW, in my experience both kids seem to be much happier when they are side by side.