Hi,
I used PowerBI and ADW in Feb/Mar-16 for a project w/ DirectQuery and performance was quite poor.. this was for a number of reasons including data granularity, contention on the db, the fact ADW was still preview etc. etc.
I have heard anecdotaly (sp?) that it is much better now, although do not have a way of proving checking beyond spinning an AdventureWorks ADW instance and connecting up to it.
Can anyone offer any real word experience working with these two services almost 1 year on from when i last attempted.
Regards,
Chris.