I co-owned a US 27 with my brother for quite a few years. Generally they are a good boat. The windows tend to leak, but are easily sealed. We found the construction to be better than anticipated.
As to sailing ability. The boat sails beautifully. We had her on Lake Erie for over 3 years and sailed in some very rough conditions. We had no trouble when other boats were being damaged due to the conditions. The boat points higher than most and sails with a very light helm. The bad rep Bayliner had due to the Buccaneer line
unfortunately followed undeservingly to the US Yacht line
. In my opinion they are much better built than the Hunters of the time, equal to the Catalinas. If you can get one for a descent price get one.
One thing, the cockpit is a little small, but because of this they have the best interior rivaling most boats up to 32'' long.
By the way I currently sail a US 21.
Pearson did build exactly the same boat for 1 year, identical down the fabric used in the iterior. Here is a URL for the Pearson version.