I have used the topsider exclusively for the past 5 years and have no complaints. The suction only takes about 10-15 minutes and I have absolutely no oil stains on my floor. Contrary to most people, I like to do oil changes with a cold engine as compared to a warm engine as I feel I am getting more oil since the motor has had some time to sit. In addition, I think the oil is pretty much homogeneous and any particulates are in suspension or in the filter.

To help with any vaccum leaks with the topsider, I use teflon tape and teflon paste. I changed my oil today and it only took me 30 min which is faster than if I would have driven to the mechanic and have him do it.