How good is the support? I ask because last time I tried HyperV I had lots of really lame issues. Like breaking the CD-ROM drive access and their workaround was to copy over an ISO and mount that locally or something like that. It felt like Linux was an unfinished offering. Yeah, I mean it ran... but not well. I figure some of what I ran into was user error since its a new tech to me but I've talked to a few people who have had serious HyperV issues so I'm not going to take all the blame.
I bring this up because I'd imagine those Linux VMs are sitting on top HyperV. I'll be very happy to hear that my fears are unfounded and they run great though.
I'm a Linux guy (well, I was a year ago :), but I'm working for Microsoft now, and get $150/mo free on Azure ; although I haven't used many of the advanced features, I'm running a few tiny instance, both Windows and Linux; it works great and has been pretty reliable (and the UI is nicer than AWS :)
The company I work for tried hard to make HyperV work, but they ended up ditching it as an inferior product.
It definitely wasn't up to the enterprise standards they were expecting. I don't know what were the specific issues they ran into, though (I'm on the development side currently).
While I've never used a Linux VM on Azure, I can say that every question I've had was answered quickly and extremely thoroughly. I've never ran into anything that support was unable to help with.
I bring this up because I'd imagine those Linux VMs are sitting on top HyperV. I'll be very happy to hear that my fears are unfounded and they run great though.