I like that they are very knowledgeable about their product which helps me get to where i need in less time than other companies would take! They ask good questions too so it is easy getting feedback as opposed ot just providing what you want without any back an forth communication if there may be problems down line or something else comes up later when trying out new things etc..
Nothing really but some minor issues here nd ther not much more since everything has been resolved quickly by them though nothing major anyway :) Support team was great at answering my concerns through email/in person meetings even after hours sometimes late into night (though this could have had anything wuth working towards). The people who work hard everyday keep us moving forward no matter how small tasks can seem simple now days compared before using sharepoint server 2013 : ).