I also held it and extended and closed it a few times, the weight felt ok, but I would replace the brush head with one of alex's lightweight one.
The clamps ae released by the right hand, I would perfer the other hand but according Craig to cannot you cannot swap them around.
I don't know what the sl-x is like but if the pole is like the sl2, then I would have to say that the Ionics one felt more ridgit to handle, I do get the feeling that the sl2 will break when I am using it, the Glyder felt more solid.
With a saving of £19.55 (including the vat) I think that Alex has got some real compertition in the Glyder, and with his stock problems I feel that he will lose many customers to ionics because they cannot wait for his stock to arrive.
Ionics also have brought out an anti-snag hose connector which I was impressed with and will be ordering some soon.