I have the Jane powertwin, its a tandem 3 wheel pram, baby can be in either front or back & yes the car seat just clips on really easy. I usually have my toddler in the back as that seat fully reclines back if he wants a sleep & baby is then facing him. If we're on a day out I would have toddler up front then he has a better view & cant poke his brother if he gets bored It is much easier to push/ jog with the heavier child at the back thou.

It has brilliant tryes & suspension even when I'm jogging along the baby hardly feels it, they both look very comfy, the front wheel swivels all the way round or can be locked on when jogging so it doesnt wobble around.

Ooh also it has a handbrake? Like on a bike if you need to stop suddenly. I love it, I had the single version first

Hope this helps, message me if you've any other questions x