i have the city select- but got it after the boys were in car seats -so i never used it with the car seat attachments.
I saw a woman in the mall with it today and it looked awesome! The attachments has the seats up fairly high - and spaced nicely apart - i had wondered how it would work b/c the stroller is pretty short - but it worked great. She said she LOVES it.
We were comparing strollers (I had my valco with the toddler seat attached with gets so much attention b/c it looks wacky) ... so funny.
So- for those who are considering the select- just another 'review' for those who will use as a DSNG, too!
Re: Saw MoM with City Select w/ Car Seats attached... it was cool!