The only good alterseat chair in my opinion is the cg prime gold standard. every other chair is just meh. The build and quality of the cg prime feels A LOT better than the 2nd best chair cg 07 plus. been using on it for couple weeks and still good. the cg 07 i went and try, sit for 5 mins and I already don't like, sat the cg prime and feels so good and spacious. can check my reviews in 1 or 2 pages before this post