I'm still confused. Which brand were you looking at?
If you mean Silverline, I can vouch for them. I have three or four power tools from Silverline, including welders. There's nothing wrong with them at all and they offer very good value. Touch wood, nothing has gone wrong so far.
I have purchased two Silverline angle grinders in the last year, both have been used on a large fibreglass yacht rebuild involving heavy duty grinding of GRP, the first one lasted 5 months before expiring but at £12 i chucked it in the skip & brought another which i have caned unmercifully, its still going! Interestingly a lot of their stuff actually has a three year guarantee but at the cheap prices i dont suppose many people take them up on it.
I will save my good quality tools from the glass dust!