I went to them a few times. I would say food and price were both average for a sit down restaurant chain. Your assessment of the wait staff is correct. The trouble with any theme restaurant chain is once you’ve been the theme itself kind of grows stale. If not once certainly at some point down the line. Planet Hollywood, Rainforest Cafe and others have all bitten the dust eventually. Boobs had a run I suppose. They even had a short lived airline.
When they are starting out, they generate a buzz while providing superior food and service. The chain grows rapidly and is suddenly in every major market.
Once the chain matures and saturates the marketplace, it becomes difficult to maintain the bottom line. Cost cutting ensues. Portions are reduced. Many entrees are shipped frozen and microwaved on the premises. You have to start asking the waitstaff for extra napkins and for salt and pepper shakers to be brought to the table. Shortcuts are taken on ingredients. The drinks are a tad watered down. Applebees is a perfect example of this.
Eventually the chain starts closing restaurants and endures a slow (and sometimes rapid) death.
Only a few manage to break the cycle. Texas Roadhouse is an example.