I really wanted a Bob Revolution Duallie for running with my 3.5 and 1.5 year old kids, but the price is ridiculous. I got this Kelty Deuce on sale for a great price. It has some great pros including:
Very lightweight, even for a double (lighter than the Bob by far)
Sturdy aluminum frame
Comfortable for my tall kids
Easy to push and maneuver
Easy to fold
Easy to assemble (just snap on the wheels)
All those qualities are amazing, but it had two MAJOR cons that made me send it back:
It is just barely too wide to fit through a standard doorway. That means if you took it anywhere besides running outside you'd have to leave it outside. If you only want to use this for running that shouldnt' be a problem for you.
Also when you flip up the sunshade it sticks straight up! At 5'4", this means that when it was filpped up I couldn't see over it.
Kelty - fix those two issues and I think you'll get a lot more buyers~!
Other minor cons (not deal breakers for me) include:
The seat doesn't completely recline (But does recline enough for a nap
No carseat or tray adaptors like the Bob has