I personally have the Graco DuoGlider and I love it for several reasons.
- It's not side-by-side so it's narrow enough to fit through any doorway
- They aren't expensive and run about $150 brand new (I bought mine used in excellent condition from CL for $80)
- I think it's one of the easiest regular (not jogging) stroller that I have used and it turns easy
- You can easily sit infant carriers/carseats (I have only tried Graco) into either seat and the sun shades create a cacoon of protection against wind/sun etc.
- It is lighter than any other regular double stroller that I have ever used and I can easily lift it into my van or even up high onto my DHs pick-up truck (I'm 5'5" and weigh 115lbs)
- The sun shades come off easily if you don't want to use them
- When you fold it up it stands on it's own. I fold it up and throw it in the back of my van and leave it standing so I don't lose storage space back there by having to lay it down.
- The rear seat lays down almost completely flat
There are other reasons but I figure these were the most relevant reasons for you.