Disclaimer: I hope what I'm about to say isn't heresy on this site; I don't know WC's reputation here and don't intend to be toe-stepping. I appreciate the exposure Wilson has brought to Beretta and the new blood being injected into the 92 lines in part because of his prodding. I own and use a few WC parts in my 92's. All that said...
I've tested two Brig Tacs with WC trigger jobs. They may be considered 'good,' but my personal LTT pistol's trigger (probably 10 years old) is several orders of magnitude better than either of them. Frankly the WC jobs didn't feel much if any better than a stock 92FS or G trigger with a D spring installed, and were notably worse than a stock 92D trigger which is smooth as glass due to the lack of a sear in the works. I was so underwhelmed with the Wilson jobs that I'm not even sure I faked being impressed good enough to fool the owners who had spent their hard-earned money on them. I hope they were done on Friday afternoons and not representative of the breed. I would suggest getting ahold of a 92 with WC job and trying it out for yourself before spending your $$ if at all possible...and compare it to a simple D spring swap to see if it's worth the squeeze.
The only Beretta trigger I've felt that surpassed mine is the one on EL's personal gun he brought to the class I attended last August. And the difference wasn't much. After trying mine, he said the difference was probably the WC transfer bar that he had on his; mine was done long before those came out. Aside from that pistol, I've never felt a Beretta trigger that approached the quality of the one in my gun.
I have not had the pleasure of testing an Olhasso job, but have heard good things about them.
I'm not sure people who haven't felt an LTT trigger job from the days of yore even have a concept of how good a 92 trigger can be made to feel.
PS - Since this is a CZ vs Beretta thread, I will say that I've never owned a CZ but the massaged triggers on several of those I've felt are among the best DA triggers of any type I've ever felt. Must be something about the design, but my memory is of no perceptible stacking on the DA pull at all. I've been fighting the urge to buy a nice CZ and try it out for a year in IDPA for awhile now. Mainly I'm afraid I wouldn't come back to my Berettas which I dearly love.