Been using VQ for 4 years already, just re-contracted recently. Didn't really have issue with them other than nation wide outage or undersea cable issue...most of the time saw people complaining but am still happily surfing net...
Though, I do agree that this price war thing seem to be affecting quality and their technical support ability seem to have dropped quite a lot compare to in the past.
Thinking about the hassle to change ISP also puts me off and VQ is already on my 2nd TP port. Used the first port when I was on M1 100Mbps before switching to VQ. Talking about M1, I didn't have issue with them as well despite so many complain of slowdown in forums...

Was using N56U at that time or maybe, certain exchange do have more issue?