R.S.
We just bought the sit and stand plus. I LOVE it! I keep it in the back of my van and use it to go to the doctors, the postoffice, the grocery store... everywhere basically.
The seats do hold up to 40-45 pounds so that is great. I love that our son has the option to sit in a seat (we use this if he falls asleep). We had the older sit-n-stand and loved that too, but this one ROCKS!!