I think this is an excellent little adventure. Its just a dungeon crawl, but its easy to drop into a campaign. I found that the module was well written especially the background information and the situation.

I agree that the 'battle mats' aren't much, you may not even want to use them and wing it. Its also not a long adventure so it won't turn into a Grind for the players and the DM.

It may not be obvious, but it helps you get some use out of any pesky Skaven minis you may have (including your globadiers).