I've had my UG cart and extensions for about eight years and it is awesome for onsite work. I'd definitely buy it again. Once the scales on the extensions are calibrated, you can remove and replace them without recalibration. It's easy to transport, fast to set up and stable. I don't use the stand in the shop and have my Kapex mounted in the middle of a 24' run of cabinets instead.
In both cases I have a dedicated CT15 with a short 36mm hose. Contrary to marketing, there is still a lot of sawdust to clean up.