I bought an Acer laptop a while ago, then I found out the support they sold me was through a third party that had terrible customer service and they never upgraded the drivers after shipping, which made the laptop useless a couple of years down the line.
Yeah, the worst lecturer I ever had was a maths genius. I remember on one occasion someone asked a question and the best he could do was "but that's trivial".
I learnt my lesson though, never by from Acer.