Phillips 26 Glacier Cruise went beyond my family's expectations, and I would recommend it highly to anyone.
Some context to my review: I lived in Alaska for 10 years and had seen (and walked on) glaciers in the past, but had never seen any tidewater glaciers. My wife, 6 year old son and I took this cruise while visiting family. Although I was really excited to do this cruise, my wife was thinking it was going to be too long for my son, and too much time on a boat for her. In the end, everyone had a really great time, and my wife was really glad we did it. My son was engaged almost the entire 4.5 hour cruise, with his interest flagging only at the very end.
The boat itself was very clean, well maintained and comfortable; the staff friendly and professional. The fact that it was a high-speed catamaran meant that we had a smooth, stable ride and that we were able to make it far into Prince William Sound compared to competing tours of the same duration. On the other hand, the cruise still only included close viewing of only 2 tidewater glaciers, so not sure how much of an advantage that was.
The wildlife that we saw on the cruise consisted almost entirely of sea otters (I would estimate easily over 100) and kittiwakes, but not much else. From some of the other reviews I read, that wasn't too surprising: If you want to see a lot of marine wildlife, I would recommend a cruise out of Seward (Kenai Fjords) instead.
There were some really nice little touches such as free loaner binoculars, freshly baked chocolate chip cookies, and margaritas made with glacier ice. The food was decent, though our expectations were pretty low, and it was nice to have a full bar.
The park ranger narration was informative without being overly intrusive or annoying, and they had a 'junior ranger' program (consisted of doing some activities related to wildlife and the Chugach National forest, and getting a badge at the end of the cruise) which was nice for my son. (I assume the other cruises with rangers may be similar in this way.)
There were some aspects of our positive experience that might not apply to everyone: First of all, the weather was very good on the day we went, which can make a huge difference. Secondly, the winds were such that College Fjord was relatively ice free, meaning that we made it farther up the fjord than they had been able to go all summer (according to the ranger). Finally, we went at the end of August, so the boat was only about 1/2 full. Could have been a very different experience if it was closer to capacity--not sure how much it fills up in peak of the season.
One other note: The full adult fare at this writing was $139, but we got a coupon from an Alaskan relative for $40 off per adult, so look around for coupons or promotions before you book.
All in all, a great experience.