I also have used Rubi cutters for many years. In fact, I still have the very first one I purchased and it works fine (at least 25 years old). I currenly use the TX 900 since most of the jobs we do are 18 x 18 or larger. The TX 900 is large and heavy but it can easily cut 1/2" off a lage porcelian tile. It is very durable and has an addition support bar along the scoring track that makes the guide bars more ridged.