I have nemesis. Very quick to fit, well made, far, far easier than the AlKo thing. I have one of those as well.
Easier to get off than a AlKo, probably but then you would need a cutter to get either off.
Mine is the Nemesis Ultra, the one that fits to the wheelbolt. Highly recommended. I fit to the off side when on site really quick and no issues with leveling as it fits in any wheel position. When I park up in storage i put the Alko on the near side.
A day of all things motorhome and campervan. The show is held both in the main indoor arena and across the grounds. Catering, hot drinks and food options are available. Easy access to the site and free parking included. Win one of five pairs of day tickets