They are not bad. We have them at work, but do not have the quality of Blue Tongue or Big Red. They are not a bad intermediate price option. But you do get what you pay for and I have seen these overheat (not destruct) and a lot of cheaper models fail completely. You may get a good run out of a cheapie but almost guaranteed it will let you down at the worst possible moment.
My pick if i was buying again would be the twin blue Tongue, expensive but should last.

