I have used a Taylor 2006C which is the big test kit from Taylor for around two years now. The regular 2006 is pretty much the same size as the TF-100 (but there are some small differences). My two cents for anyone new to pool testing is: help this website out and support it by purchasing a TF-100. There is no better way to support this website, which is way to valuable to lose, than to get a TF-100.
You will NOT regret getting a QUALITY testing kit. Do a search, I do not believe you will find one bad comment about the quality of the TF 100 test kit. And now with a 18 month guarantee on the chemicals......come on, no question now as to which way to go. No more Taylors for me anymore.....
Bob E.