Our Favorite seat
While extremely heavy, the Diono Radian R100 is a great seat. Comfortable, easily adjustable, has all the attachments for seating arrangements you could need. I love that the instruction manual is tied to the unit, so it safely stays behind the seat while it's in use.
Fabric: we have owned both the red and this khaki seat. The red fabric may have not been as comfortable as the khaki, which is more like perforated leather. My 4 year old calls it bandaid fabric, which is close to the way it feels, like a padded waterproof bandaid.
The crotch buckle is a bit tough to press enough to open, my 4 year old has a hard time with it and has to be let out of her seat still.
We have found when you need to move the seat, wearing it like a backpack has been helpful in carrying it. It's preferable to our Chico Next Fit, which is not only heavy, but an awkward shape as well.
The Diono R100 is a very slimline seat. We fit 2 in the back of my '08 Honda Odyssey Touring with room for another child in the middle.
The height and weight limits are great. My 7.5 year old just transitioned out of the 5 point harness on her Diono when she reached a height that we were comfortable with using a regular seatbelt with.
Relatively easy install
Wide range of child fits
High weight and height limits
Difficult to depress crotch buckle