Had some first hand experience with the harris pole, and even though I appreciate your feedback sometimes groundhog, the harris pole is seriously rubbish, even the unger aluminiums are better, it was floppy, bad clamps, quite long when closed. Yea, it's cheap, but you get what you pay for.
So yes, breakfast lunch and dinner like I said.
I think you must have been looking at the wrong pole mate!!! the pole is about 6' when closed, its very light, very stiff and in my opinion the clamps are excellent and very easy to use!!! I've used unger poles and this is miles better!!! From what you have said above I seriously doubt that you have ever used a harris pole to clean windows with!! I use mine everyday and wouldn't change it for anything!!!
The label said Harris pole 5m.
Yes it is quite light, I must agree, which was nice, but the locking cones on the Unger are sturdier, I can know, because I have a 20', and whilst it's not as floppy as an Xtel, compared to the SLX it's quite floppy, and the closed length is not as practical as the SL-X. I just don't see how you comment on the SL-X when you've never used it. Seriously, it's in a completely different league. Just give it a go, you will be pleasantly surprised.

Sure if I had a low budget I would have gone with a harris pole, or something similar, but I have the budget to invest in good quality tools, that will last me ages, and trust me, I'm sure that I don't make as much money as you do, I don't have a full round yet, but still I will earn my money back with it.
To each his own I guess, I wouldn't be that unhappy with the Harris pole, but I would if I compared it to cleaning with the SL-X for a day.