I owned an Acer Aspire 5100. After about 8 months it developed random problems of PCI conflicts during POST.
When I contacted Acer the first time about it via email, they never responded. When I called, the first rep I spoke to put me on hold and 20 minutes later I was disconnected. When I filed a request for warrenty repair, they told me this was not a defect of the laptop and was not covered under warrenty. I spent hours searching on Google and found out it was apparently a known problem and that they weren't doing anything about it.
They blatently refused to stand behind their product. Every time I tried to talk to them they either ignored me or blamed it on abuse...which that laptop never saw any abuse other than every-day wear and tear. When the unit was out of warrenty...they finally offered to fix it...for around $250.
After looking at a few Acers, I discovered thier build quality, as mentioned, was very inferior to anything else on the market. IMO, I'd advise against purchasing an Acer product of any sort ever. They don't last and when they do have a major defect they decide to blame you 'till the warrenty is out and then say "it's a defect and it's a $250 repair for out-of-warrenty". *facepalm*