I bought the "movie" version of the first six episodes of Ultraman: Towards the Future/Great on VHS here in the UK in the early 90's after spotting it in the local WH Smiths, not knowing anything about it or Ultraman at the time. As a huge fan of Godzilla it was a great introduction to a whole new series of giant monster action, and I really, really enjoyed it. It was a little while later when I was round at my cousin's house that I saw an actual episode on Nickelodeon that wasn't part of the "movie", and realised it was actually a TV show. I'm not sure if I ever managed to catch all the episodes, but I'm pretty sure I saw most, and of course I have the strongest and fondest memories of those first ones that made up the content of the tape I had.
Every now and then for years I've checked in on various sites and searched around to see if there's ever been a proper DVD or Blu-ray release, and always come up empty. I've got a lot of nostalgic love for that show, even though I'm not sure how well it might stand up today, or how good it would be for someone watching it fresh for the first time. I still really like the suit designs they had though. Some really cool monsters there.
So yeah, like O.Supreme says confirmation on the language and subtitle situation would be key, since obviously it was produced in English. Chrome's "translate" function only works so well, but it looks like it might be available with both the dubbed Japanese and original English-language dialogue options plus removable subtitles, which would be perfect if true. And it does say "region free". The only problem now is the price. But damn......that nostalgia!