Recent Review: When we moved into our 1930 mansion type home six years ago, I was so disappointed to discover that the huge basement leaked badly after every rain and wasn't going to be as usable as I thought. Over the past few years we tried so many ideas and even hired and quot;The Old Cellar Manand quot;, a popular basement contractor in central Oklahoma (Shawnee), and paid him $8000.00 to waterproof for us. But the basement still leaked just as badly after his work and we almost took him to small claims court. Really frustrating! We had about given up when I read about Basement Systems on the Internet and ordered their book. We thought it was worth one last try and I cannot believe it, where we once had puddles all along the perimeter and seeping walls, we now have a perfectly dry basement that we've even carpeted! We have a game room on one side and a nice apartment on the other with bed and sectional sofa, etc. Its a dream come true! I was more than a little suspicious of basement contractors after our previous bad luck, but I soon realized that the Nelson Waterproofing owner, Richard, his son, and the other guys that did the work were genuinely honest, hard working, knowledgable, and even very nice, fun, and cheerful. I really do trust these people and they know what they are doing and I really enjoyed having them in our home. They even came back to help with a little problem our carpenter caused which has been resolved nicely. The downsides to their work would just be the huge mess it makes. They do a pretty good job of cleaning up, but you are still left with a heavy layer of fine powdery concrete dust on every square inch on anything in your basement, and its very hard to keep it off of all your stuff, even if you cover it in plastic. I ended up hiring a local floor cleaning company to clean the concrete floor for us. Also, Nelson Waterproofing put up their Basement Systems white vinyl material on the walls (which we have since finished out), and I must say, they are not exactly professional wallpaperhangers, so don't expect perfection there, in case you plan to leave the vinyl exposed. But all in all, we were very happy with the work they did for us and heartily recommend Nelson Waterproofing.