I have a Hawkeye in .257 Roberts. I tried a few Mk II models and they were good rifles but I never did own one. The trigger on the Hawkeye is just plain better than the Mk II. Mine works well enough that I don't intend to slick it up. And the stock, though outwardly very similar, has been vastly improved, in my opinion. Both the forend and pistol grip are slimmed down, and the recoil pad is much nicer. Some would argue that a recoil pad on a Roberts is superfluous, but I find with maximum +P 120-grain handloads the perceived recoil rises dramatically.
The thing that I like very best about the stock, though, is the wraparound forend checkering. I think that's a big plus on any rifle. I don't know if it's on the synthetic stocks or not, but on the wood-stock Hawkeye it's a big plus for me.
The rifle shot okay out of the box, and with minimal load development and a quick free-floating, shoots better than MOA.
What do I NOT like? A few things. Much as I like the stock, I don't find the forend grip as secure as my old Win 70 Fwt, but it's pretty good. My rifle has pretty nice woodgrain, but the finish mars fairly easily and I expect it to be a bit battered in a couple more years. I'm no huge fan of lightweight rifles, so the fact that the Hawkeye is a standard-weight rifle is fine by me, although I hear a lot of hunters who were raised in this age of flyweight arms actually find the Hawkeye heavy. It's not.
I also PREFER a removeable mag. Note, floorplate guys, I said PREFER! Not available, so no biggie. I also prefer the tang safety to the 3-way, but once again, no big deal.
The biggest disappointment I have had with the Hawkeye, particularly vs the Mk II, is the fragility of the finish, both metal and wood. The wood is easy to scratch, and the metal likewise. I don't mind the greyish matte finish, but I think I'd rather have the old Ruger gloss blue. And I don't know what the finish is on the stock, but a few more coats would probably help.
If there had been a .257 Roberts available in the same price range with the features I prefer, i.e. tang safety and drop-out mag) I likely would have bought one of those instead, but at the time I was unaware that Savage does custom chambering. Still and all, it's a good rifle.