I have been a Netflix member since 2001. I used to do the 3 DVD at a time option, and then added the instant when it came along. Thought it was the greatest thing since sliced bread. Still think it is in a lot of ways. But there are a few things that have bothered me over the years:
1. Annoying that not everything in their physical catalogue is available instantly.
2. Worse still is when certain episodes of a show are only available physically. Just yesterday I noticed that certain episodes of The Tudors, randomly scattered about the 4 seasons available are only available via a physical DVD. What the heck??
3. Didn't like the deal they made with the different studios to not have releases available until at least 28 days after the initial release. It seems to take even longer for instant movies.
4. Lots of instant movies are not available in HD when there is a blu-ray available.
5. Didn't like when they were throttling.
6. I haven't tested this, but a friend told me that a physical blu-ray will still look better than their HD streaming version of the same movie.
Obviously I am not a fan of the price hike. But right now I am only doing Instant so it's not as much of a bother. There is tons to watch, and the great thing about instant is discovering stuff I would have never considered renting. However, my biggest fear is that they will continue this trend of having parts of seasons available instantly, and parts physically, so that the only way you can watch the whole show is by subscribing to both services, and therefore paying double. Luckily I just recently finished Spartacus, but now the first 4-5 episodes are only available via physical release, while the rest is available instantly.