Has anyone use booster seat brands Combi? Is it good?

From the specifications provided, http://www.walmart.com/ip/Combi-Kobuk-Air-Thru-Booster-Seat-Licorice/15902654#about Combi Kobuk Air-Thru Booster Seat -Designed to accommodate a child 3 years and up, from 33-125 lbs and 33-57" -Converts from a highback to a backless booster -Integrated padded armrests -Removable cup holder for left side or right side -Removable and washable fabric cover -Dimensions: 17.5"L x 19"W x 25.5"H -Dimensions without back: 17.5"L x 15.75"W x 9.5"H -Product weight: 9.5 lbs -Product weight without back: 4.62 lbs This combi brand booster seat seems quite comfortable with the features of the height adjustable backrest, armrests and removable cup holder of this Backless. It can be used as a highback or as a backless booster, keeping your child safe after he or she out-grows a car seat, which is a plus point as you do not need to buy another backless booster seat when your child is older.

thanks

nope. i don't find them good.