Lidl sold those for a while (with a lever clamp, but otherwise the same) and I bought one. It's fine. My major gripe is that the clamp that holds the horizontal arm does not grip that well, so it you don't clamp the bike near the balance point the horizontal arm will rotate and the bike will flop nose or tail-down. Most of the time I just rest the bike's top tube in the clamp (to get near the balance point) and close it enough to stop it jumping out, but not really holding it with any force.
Lidl sold those for a while (with a lever clamp, but otherwise the same) and I bought one. It's fine. My major gripe is that the clamp that holds the horizontal arm does not grip that well, so it you don't clamp the bike near the balance point the horizontal arm will rotate and the bike will flop nose or tail-down. Most of the time I just rest the bike's top tube in the clamp (to get near the balance point) and close it enough to stop it jumping out, but not really holding it with any force.