Overall they have great service. Only their Fremont location has been a bit touchy this year. I've been with them since the days they used UML before Xen and if it's any consolation, I have experienced at least one downtime in each DC(but this was over the course of many years now). Unless you plan for distributed systems, expect some failures from time to time no matter who is the provider.
From what I've encountered, and what I've read, Fremont has been the most patchy Linode DC - they've had two outages there recently. One just a day or two ago, and another in early May. Apparently there was a significant outage late last year too.
p.s. The last two weren't network outages - they were total power failures. Your 'node would have been hard-booted as a result.
Just a fluke. I've been a Linode customer since 2008 and have managed multiple Linodes (on the East coast) and as far as I can tell, Linode has given me more than four nines.