I like that it's easy to use, my customers love how fast their site loads up! We've had some issues with getting our server set-up right for autocomplete since we're using MVC5 C# code behind files in an existing ASP platform - so there are no out of band fixes or workarounds at this time aside form trying different versions/configurations which isn't ideal long term support wise if you run multiple servers etc..
It would be great though because then all environments can have similar functionality without having customizations required per environment e;g webforms vs mvc4 / 5.