- compactness (for a reversible)
- leg rest (short)
We bought a 500 GBP worth Nuna Triv not too long ago. I wish we'd buy something less expensive since it didn't fulfill my expectations at all. The narrow rear axle makes it prone to flip to the side, so you always need to hold your pushchair with both hands. Also, my daughter's feet are hanging from the leg rest, and she's not that big yet. I'd wish the canopy was bigger and it wouldn't extend by a mesh-only section since when in lie-flat mode, the wind and cold go through on my little girl's head. The Triv is not all-terrain at all, from my point of view, and the popping up curbs is difficult and feels like straining the frame a bit too much.
I wanted something smaller after our first - bulky stroller system to use ever\day and travel with as well. I am, however, not happy with what we got and wish we'd go for something forward-facing...