I like this dungeon a lot. It was the first OSR thing I ran, and the first RPG experience for a dozen or two people who played with me over several runs. It has been very successful in putting my players into the OSR mindset; the first level (about 7 rooms) sets expectations for the rest of the dungeon perfectly, making players treat everything they find as both potential threat and potential treasure.

The first level and a half is somewhat linear, but the dungeon opens up pretty quickly after that. Some of the things in the dungeon are brutally dangerous, but that won't come out unless your players are constantly aggressive, which is good fun either way.

If nothing else: the PDF is free. Just grab it. The worst case scenario is that you delete it and forget about it.