Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Solid

This does the job, although I'd prefer one that simply unscrewed/expanded to fix itself in place by pressure--I used to have one like that that worked great.The hanging brackets are ok, but a bit fussy with the lock-in tabs which supposedly keep the bar in place (although it's hard to imagine it popping out through the top as you're doing chin-ups).Definitely worth pairing with the P90X Chin-up Max - Pull up Assist Band, especially if you're not quite as strong as you think you are.