I gave it 5 stars, would have given 4. However... a lot of 1 star on here doesn't have anything to do with Vudu from reading their review.
I have had Vudu for a few years... in the beginning it would buffer with me as well, however, I had 6 mbps, I now have 24 mbps and it never buffers even on 4K movies.
I do like to have a hard copy, however, we are dropping most hard copies and opting for this video library on Vudu. It is convenient, good quality, intuitive. Love the way you can click on actresses/actors and shows you all their movies they have in stock, and love the sorting. They give great deals weekly like $4.99 movies, 99 cent rentals, bundle packages... they also have some new movies where you can opt for the hard copy and the digital immediately! WE have done this, the movie comes from Wal-Mart I think... I would have given 4 stars, deducting 1 because customer service isn't too great, its ok, but mainly because you can't upgrade a standard version to a HD version. I had opted to upload a dvd and pay only $2 for standard version and wished I had went HD... They should have a button to upgrade any standard to HD if you change mind or come across more money. The upgrade would be $3. Instead, customer service said they would delete the movie and you had to go in and buy the HD full price after you had already paid the $2.
They have gotten better over years. Looks like they are here to stay.
Anyway... great movies, great weekly deals, great intuitive site.