I never played the original MGS games. My first experience with MGS was 4. So I didn't play with the old control schemes. All I can say is they control horribly in my opinion.
The games and stories are good enough. However, to play with outdated control schemes of the past you'd have to be looking to relive the experience of the past. These games just don't stand the test of time from a control standpoint.
So if you are a huge MGS fan with fond memories go ahead and rent or purchase (my review won't apply). For anyone else I found the controls annoying and gave up pretty quickly. I'd suggest a skip.
1) MGS has story (rare for action games)
2) for the fans of the past they can relive
The absolute worst controls for any game I have ever played. Unimpressed by the graphics and dreary colors. Please explain why I can't aim my gun at at enemy while I'm walking around. I played it for about 1 hour and back in the envelop. I don't know who is hyping up this game but it blows.