I have played every Myst game since the original and read all the books, but I held off on buying and playing Myst V for a long time because of the interface change (aaaaand because I'm Dutch, and we don't buy things full price). My assuption was that it would feel different from the other Myst games. Many years later, on sale on Steam, I thought "for $10, why not give it a try".
My reveiw is mixed, first the pro's:
1. If you know the Myst story, it is a fitting end in terms of plot. You should probably play it for the closure.
2. The worlds (with the exception of the 4th Age with the arena, which was a snore) are still as beautiful and imaginative as ever. I was particularly impressed with the "Observatory" age.
3. The game gives you the ability to place in one of several modes, from "classic" to "free-mode", so the change of format did not affect the game as much as I thought it would in that regard.
4. The game adds new elements to the Myst world, so there is more to discover!
Now the con's:
1. The change from real actors to computer animated motion capture made a HUGE difference for immersion in the game world. Frankly, every time a character was on sceen they looked rediculous. Because of their rediculous appearance I found it really hard to accept the dialogue genuinely... something that never happened to me before even with some of the over-acting in the rest of the series.
2. The puzzles were far too easy and the worlds far too small. I got through the game super fast (my log says 68 minutes but I think that's innacurate). Basically one day. I bought it Thursday morning and finished it Friday afternoon. That included all reading, puzzle solving, and even some down time where I went to do this and that but left the game running. Myst took me a good week. Riven probably 2-3 weeks. Exile and Revelation somewhere inbetween, and Uru... well I never finished that ;). This was therefore the shortest and most dissapointing of the series in terms of bang for buck or immersability (whichever means the most to you).
3. The plot was too predictable. The big twist at the end can be seen from... well, from the beginning. Myst is about Mystery, judging who will be evil and who will be good, and finally making a decision that will determine all (p.s. I died twice when playing the original Myst... like everyone else probably)! End of Ages was about the end of that mystery, there was no secret what should be done (though I tried the other options first in order to see the alternate endings).
I enjoyed the game, but it felt like a "Myst Snack" rather than a "Myst Meal"... and I was hoping to end my Myst experience with something like a Christmas dinner, not microwave popcorn. Oh well. Don't buy it unless you want plot closure or just to see the imaginative worlds.