I've been using my topsider for the last year. I have used it on my boat, and my car.
IT works great, have had no problems except the clamp to seal off the hose for the vacuum to build up broke. no biggie I remedied that easily.
I never change my oil at piping hot. I always lett he car sit for 20-30 minutes at least before I do it, that way oil has a chance to drip back down into the pan.
Unfortunately to get under the car now that it is lowered requires jacking up the car and propping it on jackstandas, so I doa topsider change every 3k miles, and let my mech to a regular change when I take the car in to him for other repair services.
'92 300CE - Sold
2004 C240 - C7 Wheels
2015 ML350 - P1, Pano, Ash poplar wood, Sport Dinamica interior, Running Boards Keyless go.