Combi Coccoro car seat

We use a Clek Fllo and Foonf in our everyday cars, but they're big, solid, and heavy, and not for travel (though I have read a blog post of someone using one of those on a plane!). We wanted something easier to travel with, and the wisdom of the 'net said that the lightest, smallest seat is the Combi Coccoro (I always have to look up how it is spelled: Coccoro or Cocorro, or Coccorro? A rather unfortunate name since the spelling is not clear ... anyway ...). We have flown with this, and used it as a regular car seat at our destination. Let's say, it works. While transiting, we strap it onto a regular folding luggage rack, and that works fine. There is no need to use a specialized rack like the Gogo Babyz. That probably works fine, but it's overkill. A cheapie luggage rack works fine too. With the rack, it can be wheeled down an airplane aisle. One reason we like this seat especially for airplane travel vs, for example, the Cosco Scenera Next, is that it has a hard back between the belt and your baby's back. Although we don't have direct experience with the Cosco, others mention that the belt buckle can be felt through the back and thus uncomfortable. With the Combi, it'd a bit fiddly to buckle an airplane seat buckle; you have to do it by feel because there's just not that much space. Two hints: one is that often, you have to shorten the buckle receiver to enable the buckle assembly to be tightened properly. To do this, twist the belt to shorten it. Second, when you buckle, keep the buckle opening flap against the chair back. If it's not, it'll be very difficult to open it once latched (thanks to other blogs for this info). so once strapped down, the seat is stable on the airplane seat, but after a certain age, because the seat moves your kid forwards just because of the depth of the seat, it puts your kid's feet just the right distance to kick the seat in front. Another thing, after a certain age, is that your kid will not always want to be strapped into it, especially on a long-haul flight. On our last long haul flight, we had an empty seat for much of the flight, and M ended up sleeping on our laps, so in that sense, buying the extra seat was kind of a waste of money. The seat is big and once strapped in, is there for the flight, so if your kid doesn't want to be in it, your kid will need to be on your lap. This is a bit of a disadvantage. How's the seat in a car? It's not so easy to strap in, so strapping it into a ride-share car can be a bit nerve-wracking with the time pressure. Especially with the tether attached, it is quite stable, but sometimes, for time reasons, the tether can be skipped and the seat is less stable. There are two design deficiencies that were negatives. One is that when you're strapping it in, it is easy to have the car's seatbelt interfere with the seat's seatbelt, with the end result that when you get your kid into the seat and buckled up, you find that you cannot tighten the traps properly. Another thing is that there is no real storage space for the seat's attachment belts (i.e. the latch connections), and they flop out and you have to push them back in all the time. In that sense, this seat isn't designed as a travel seat. Oh, one other thing we didn't like is their buckle mechanism and the way they make you fit the left/right buckle pieces together before being able to insert into the buckle receiver. Too fiddly. All that said, we used the seat on a number of trips, and it did the job. Reasonably small, reasonably lightweight, and reasonably easy to use. Not a glowing endorsement, but it did the job and we did travel with it without throwing it out in frustration.