A lot of good feedback here (mine included) for the Hirobel though for a slightly different use case: How to clamp bike in work stand when exposed seat post is too short - #30 by David_Cifelli
What’s similar though is not clamping the seatpost, which the Hirobel is perfect for. I will say a bike in the Hirobel can rotate under heavy torque (think BBs) but it’s manageable