City Select users, a ?

naflmj

How is it on various terrains?

vigurl

I am an owner not a user.  Baby isn't due for a few more weeks.  But I was told and have seen in review videos that the front wheels lock to provide easier steering on grass, cobblestone or gravel.

bakemecakes

I think it's great everywhere I push it!  I really love this stroller and think it handles well.  I mostly push it at the mall and in the neighborhood, but we've been on some uneven sidewalks in the city and gravel paths and across grass where it's been great (just lock the front wheels).

LittleApple

It might be OK now with just one seat, but when you add that other seat to make a double, it could be harder to push.  That is what steered me away from it.  It was hard to turn corners as a double.  I can't imagine it on rough terrain.

Megan.10.06

It's awesome. I've never gotten stuck once. 

I've used it for my son and my 3 year old niece, and it's so much easier than other doubles to steer.  It's harder than when you use it as a single of course, because there is no weight in the front, but it is most definitely the easiest driving tandem.