I have one of each size (Ultra Carry, Compact Stainless, Custom Royale). All are very nice guns, accurate, reliable, etc., but I like the COmpact the best. I recently put Ashley Big Dot Express sights on the Ultra and was very impressed with both the overall accuraty and fast, easy sight acquisition, so now I'll add them to the Compact. For me, it's the right in-between size for carry and balance. The only thing I'd change is I'd like one with the alloy frame.
M2