I have had a Porter Cable Model 333 single speed sander for many years and while it was a good sander its high speed alone was sometimes too high. . This variable Wesco speed is very good as I can slow down the speed and it is much more comfortable when used for a long period of time. The grinding wheels stay in place and are easy to replace. I'm not sure I'd like a hard plastic bin as static electricity tends to trap dust inside and if someone drops a grinder on the bin it looks like it could easily break. So far I like it very much. We'll have to see if it lasts as long as Porter's cable.