I own the UK set. I think it's great, no problems at all. I'll summarize it for you;
Cover: Who really cares?
But it's good!
Presentation: To the point. No ads, no drawn-out animated menus. Cheerful and easy to navigate. The "baaa! baa!" of the TV Loonland logo might burn itself into your memory, though, after the hundredth time loading the disc.
Soundtrack: Clear. No added sound effects like on the G1 stuff.
Audio: Japanese. Trust me, you DON'T want the "English" dub.
Subtitles: Important, this one. The dialogue and subtitles match well. Other subs I've seen are rather liberal with their translation. The names are all preserved with the exception of "Cybertron" and "Destron", which are replaced with English faction names.
I don't know why. Seems silly to me. I've heard that other sets replace the names of the CHARACTERS with their English equivalents. So "Lightfoot" is subtitled "Getaway" and so on. Not owning them, I couldn't say for sure, but check it out. I imagine it will be infuriating to watch like that.
So. ^_^ A good set. You'll have lots of fun watching it, there are some awesome episodes on there that'll stick with you.
さぁ! きみも マスタフォースで トランスフォーム!