I got the Combi Cosmo ST back around 7 months ago, and although I liked it in the house, shortly after the return period ended, we took it outside (moved to an area with sidewalks) and HATED it. We went to the downtown farmer's market 3 blocks away. By the time we were at the very first intersection I knew I would return it.
It's insanely flimsy, and tried to fold up when I "popped" it to get it up the curb. I now wonder if I had it fully locked open, but the stroller I have now, there's no question; the fact that there was a question with the Combi is not good IMO.
I am only 5'3", but I was kicking the back of the wheels. I had to lean my body and walk funny to keep from kicking the tires. Another "not good" situation.
The only good thing about it was the carrying strap. I miss that! Though I never actually *used* it, so that might have disappointed me, too!
We consigned it so someone else could try it out, and after much looking around, randomly came across a BabyTrend at Toy r Us for a similar price as the Combi (nicely under $50 on sale), and it's REALLY good. We took it all over
Disneyland, from our two hotels over the course of our stay and back, and it was really good. Not flimsy, easily went up curbs, and was much less fully of rattles, vs how the Combi was.
Never tried a MacLaren, though.