I owned a 2001 Offshore 54 for 11 years and travelled from South central Alaska to Southern Mexico without ever having a serious issue. Mine was stabilized and the ride was great but without stabilization it was uncomfortable for those that suffered from mal de mar.
They are easy to work on with the exception of the forward water tank and extremely comfortable as a live aboard. The company was very supportive and helpful when parts were difficult to locate. Overall it was a great boat and after 11 years I sold it for 15% less than I paid for it.