Just getting started, there's a learning curve (been working with Think N Do too long)but that's part of the fun. Am looking to upgrade all my Think N Do CPU's to Do-More (looks like it will be a big step up in scan time with the testing I've done so far). So far, I like it, I like it a lot. Would like to see one for the 450, yeah I know it's not very popular, but expensive to replace the whole rack.