Just got mine today. I've been waiting for something like this for a long time. Basically it's a Sage 2 shaped like a Delica with a flipper. As far as build quality goes, it's typical Taichung Taiwan Spyderco quality. There really isn't anything to criticize, lockup, centering, out-of-the-box sharpness, FnF, it's all superb. This review is short because I can't think of anything to say about it other than... it's perfect. Or damn near perfect.
Instead I'll just mention some subtle things that really surprised me. I don't know if you all noticed it, but the finish on the titanium is slightly stonewashed. It definitely has a subtle tumbled or distressed look to it. It is not just a flat plain sand blast like you'd find on a Sage 2 or a Sebenza, but it's not a full-on "nuked" finish like the Domino has. Another thing I noticed is the grind lines on the blade and blade tang are not parallel. They're angled on the blade, but straight towards the tip on the tang. It catches the light differently and creates a nice contrast. I've never seen that before on a Spyderco.
The only thing I can nitpick on is my lock was a bit sticky. It was actually pretty bad. Bad enough that I knew it would have taken forever to break in and go away on it's own. But I took the knife apart, gently filed the steel lock-face insert so it interfaces with the tang more evenly, and now it's perfect, 100% no sick. Lockup didn't even move. It's perfect at 50%. BTW if you want to take it apart, I recommend using a soldering iron to heat up the fasteners to soften the Loctite. The screws were REALLY tight. Much tighter than I've ever seen before on a Spyderco. Serviceability is really important to me, and once you deal with the excessive amounts of Loctite, it's a piece of cake to take apart and put back together. There's no slop or play on any other parts as they're fit together. All the hardware is the same; beefy T8 torx and I love that more than I can say.
Compared with the Domino it definitely feels like a smaller knife even though the blade length and cutting edge are longer. The handles are thinner and lighter. It's bigger than the Positron but again, it's much thinner (the Positron is chunky little knife) so it feels smaller in the pocket. The tip is delicate, but visually similar to the Positron, Domino, and Caly 3.5. It is not a stout as the tip on a Delica or Paramilitary II, but it's not ridiculously delicate like a Kershaw Leek. I don't have much experience with M4, I hear it's a mother to resharpen. I like the look of forced patinas, and I love the way the forced patina on my Superblue Caly3.5 came out, so I might go that route. So far this is a keeper for sure!
