Just got back, it was great and didn't fall asleep. Even though it was long it went my quickly.
I actually think what Villeneuve did with Dune and Dune 2 was pretty genius on a couple of levels.
He played the Studios and got the run time needed for the story, rather than getting told "no you've got to cut all of this stuff out", and he got it so that there was a break half way through every time the "complete" dune was shown.
I would happily murder some studio execs* if it meant more 2-3+ hour long films had an intermission, as I'm a great believer that films should be as long as needed to actually tell the story properly (not made to run to some arbitrary time slot that may be too long or far too short**), but at the same time any film over 2 hours in length is causing problems for a fairly large part of the audience in terms of how long you can comfortably sit and enjoy something without any chance to have a break, especially as you get older of if you've got any issues that require you to get up and move (I'm sort of surprised deep vein thrombosis isn't more of an issue
).
*Although to be fair, given the way they keep messing around with films it's just another reason to add to the list
**I've been watching a bunch of older films and the number of them that are better than I remember, or simply have stuff I don't remember is surprising, and it usually turns out that the reason is because the version I'm watching on disc is the preferred version so for example IIRC Life Force (with an early not quite picard) has something like 30 minutes of background/primary story added back in mainly to the start of the film, or Night Breed which IIRC had something like 15 minutes added back that completely changed the story.