Well also had a chance to look at the Lamello, now if a joint is pulled in tight then you would expect no movement but with the tenso you could move the joint, not a lot but noticable. Ok this joint is supposed to be glued but with dowels or dominos you would clamp to ensure adequate pressure, the tenso is supposed to apply this pressure whilst the glue dries but some doubts like
@petermillard has already mentioned.
Now to be fair the tenso might be applying adequate pressure but the Tenso is plastic, the movement is not in the same plane and might be enough to make it look worse than it really is so with glue and let it all dry before moving the problem might not exist. The clamex applies plenty of pressure and if you can work round that hole then it solves all issues except it is a more expensive connector. So with such an expensive machine it does make you stop and think, maybe the correct solution is to design out the need and find alternative methods even if they are slower.