We have this stroller and we LOVE it! I am like a walking advertisement for his stroller.... I will tell anyone that asks how wonderful it is and that I would happily pay for it again in a heartbeat! We are currently using as a single, but will be using it as a double very shortly. I have used it as a double with two toddlers and it was great!
Personally here are the things I love most about this stroller:
It's sturdy! My husband lovingly refers to it as 'the tank' because the thing can do and hold about everything.
It's a double tandem that actually gives both kids a seat! We looked at LOTS of strollers before selecting this one knowing that we would most likely have a second and I couldn't imagine putting one of my children in something that looks like storage space or a seat that sits so low in the back that it would get kicked.
Baby Jogger customer service is AMAZING! I needed a wheel replaced. I called on a Tuesday and by Wednesday I had it in my hand!
The one con that I have is that it is heavy, but at the same time, that's what you get when you have a sturdy double stroller!
I could go on and on about my love for this stroller, but I won't. If you get one I'm pretty sure you'll be a happy customer!