I say they are doing ok. None of them have been perfect, though. (US version mentions, only)
Metal Slug 3 Xbox is great because it's finally a game that makes the U.S. with all features and absolutely no censorship. The new added difficulty of the continue system is one thing, but once you get good at it, it's not even an issue. However, with 4 & 5 being much tougher games, I wonder if the same people who bought MS3 can handle a continue system with the same requirements. As a port, it's generally excellent in quality. The big thing being that it's a full-blown, full-speed, all of the time, Metal Slug. This automatically adds a bit of extra difficulty, but it's kind of like a turbo version of the original. It never slows down, and it's cool to actually play a Metal slug that does that. (There's never been a Metal Slug without slowdown before). The only thing, to some people, keeping it from being the super be-all MS3 port is the continue system making it a bit harder, and a really rare occassion in Mission 5 (that could be a cause of a loading error or a disk being not so clean as to read perfectly everytime), that can halt progress. Really rare being that you could play it 100 times and not see it happen.
PS2, I would say, hasn't quite gotten as fair a port job. They did get the KOF 2000,2001 collection. At first, the port looks like it would be nice, but after a while of play, you find the amount of flaws stack up and the Dreamcast ends up with the better (albeit more expensive) ports. Not including the fact that the US version got censored, but there are some things that definitely hurt the title. For instance, the input. Moves are much more difficult to pull off on the PS2 version, and it's not even the controller to blame. It's the programming of how it accept input from it. (This is because the same issue happens with my tried and true PS1 controllers plugged in.) In KOF2001, it's often a battle to try to remotely get a fireball motion to execute properly. For some reason, you can do it just perfectly fine for every other game (including the Guilty Gear series), and it's the same motion you used for any other version of KOF2001, including the Dreamcast port; but 1 out of like every 10 tries the move actually executes. Oddly enough, the dragon punches are easier than the quarter circles. This also translates to making supers a bear to pull off too. Only command moves and normals escape the plight.
And while you get Iori's back stepping weak kick ability back in 2000, the control takes a bit of a dive there, too. However, it's not so bad as 2001. Needless to say, the small steps forward the PS2 makes doesn't account for the major step backward that is a basic building block of a good fighter. Control. Now, in most cases, as long as the programming is good, a Joystick fixes all issues. However, this kind of goes beyond the joystick issue when the actual programming prevents the move and not simply a case of lack of dexterity.
So it comes down to me playing the PS2 version just to see the story in english, but playing the DC version for true gameplay sessions. Plus the DC versions (particularly 2001) have the better of the bonus features and the better high score tables. (Why they ommitted the high score table structure for the PS2 is beyond me) Of course, if you have the Neo Geo versions, don't worry about it, unless you want the DC extras.
Playmore does seem like it is improving, on ports, though. I expect the next fighting game ports and or remakes to not have the same issues. In fact, they'll probably give it the ports the love they deserve. Like the Dreamcast versions did before these guys, now. The KOF2k series, on the Dreamcast, you could tell they really wanted to give Dreamcast players the love, with the ports. They gave them a good amount of care, and added extras that really mattered. 2000 being the only one to slightly dip, in that area, mostly because it was Playmore's first true KOF port after the big issues of SNK's death, and it was the most rushed. Still good, though, with only 1 true flaw in conversion. The 2nd one was being the lack of survival modes like the awesome KOF99Evo one; but that came back, with the rest.
.
