I was also on Ovation from 5/20-5/27 and let me just say now that I did enjoy this cruise a lot, this was my second time to AK and while I think I enjoyed the 1st time better, this was still worth the trip.
That said, I will also attest to the long boarding time that another has men. My boarding time was 12:30 to 1PM, got there at 12:45. Ended up about 2 hours before I got on the ship. The bottleneck to me seems to be getting through the security check points as after I got past that, the wait to get actually checked in wasn't bad at all really.
There was the issue of the medi-vac that another already mentioned but that is no one's fault and is what it is. Last we heard, the crew member is doing well so that's good.
I do also recall the internet being bad, moreso at the beginning and I think lots of people complained apparently as I recall they even sent out a letter the one day apologizing. Got better as the cruise went on but nothing great and frankly a bit overpriced for what you get (note: I had the surf and stream).
Also, there did seem to be a constant line at Guest Services, I know because I had to go a few times for different reasons, not all for complaints/issues.
As for as the ship and crew, they were all good. I didn't end up going to the MDR but as far as the Windjammer, breakfast seemed to be the busiest though was packed on 1 or 2 lunchtimes too. Dinner was empty in there so I think a lot of people went to MDR for that. I did hit up Chops and Jaimes for lunch, there was a bit of a wait to be seated for that but not bad.
The solarium bistro was not open the entire cruise as far as I know. And as far as I can recall, all other venues were open as per their usual expected times be it for eating, drinking, shows, etc. The only exceptions was the outdoor stuff like the pool, flowrider, climbing wall but that had more to do with weather. If it were warmer and less windy I'm thinking they would have been open as usual.
As for the shows some were good and some I thought were just ok but that has to do with my personal taste more than anything else, the actual performances, production, etc. were what you would expect which is to say good or better.
Lastly, I do wonder if they have a full complement of crew though as maybe it's just me but didn't seem like there were as many staff as usual (hence perhaps why the bistro wasn't open).