We had a club minisuite on Regal last year, and thoroughly enjoyed it.
Strolled in around 20:00 each night, and always sat in the same general area with the same wait staff. We were on first name terms after a couple of visits.
After the first two nights, the waiters would go and get our preferred choice of wine before we even ordered it. Food service was extremely fast - in fact we quite often asked for a delay between courses.
The same people seemed to be eating each nighy, so it became a convivial social event as we chatted away.
The additional main course choice was OK, but we normally ate off the standard menu, but I did tend to do a lot of "mix and matching". Also, it was a far better breakfast experience than eating in the MDR.
So, in our opinion, a far, far better experience than the MDR.
BUT - the premium price over and above a standard minisuite is quite substantial, and, in all honesty, unless there was a special offer, we would probably not book it again.