Larger and heavier (20.9lb) than our Chicco Viaro, but the seat is smaller; we'd expect our 2y old to outgrow it soon. When folded it's 31x27x17" with the front wheel swivels unlocked (34" length when locked). For travelers, I always recommend a frame stroller with the infant carseat (Maxi Taxi), they're lighter and more compact.
The Zelia is a 4 wheel design but it's easy to turn, even one handed. We found it easier to turn than our 3 wheel Viaro. The Zelia is also a smoother ride over bumps due to the wheel placement and the suspension on the rear wheels. It's stable and won't easily tip backwards, even with a heavy diaper bag hanging on the handle.
Some great features: Multiple modes convert with minimal adjustment. The seat quickly converts to a bassinet and back, and both modes can face either direction. The self-stand latch helps, but sometimes it doesn't stand if the front wheels rotated. We had to set the front wheel swivel locks to avoid this. We also wish the folding process was simpler. In order: fold the seat, fold the handlebar, pull up on the fold handle, and ensure the stand latch catches.
The Zelia is missing features for a full-size stroller: cupholders and snack tray. It only has 1 cupholder, and it's a flimsy plastic piece that sticks out the side. The bumper bar is too close to the seat, but it does swivel open. Also, why have adapters for the included Mico30 carseat? Why aren't these integrated?
We love the premium look and feel, and the harness is easy to use and tighten. The seat cover can be machine washed AND dried.
It weighs about the same as our Keyfit30 (9lb), has a taller max height (32"), but a smaller weight range (5-30lb). Rethreading the harness is simple. The angle adjustment on the base is easy to use, but there is no level. Unfortunately we had issues installing the base, we couldn't tighten the LATCH straps enough.
Finally, the release for the stroller and base are different, which is confusing.