I'm using the big old EE, and Ermine keeps stable. Eve with its quirks, I like it more than Dingo. It has almost the same stability, it's faster, and in spite of having plenty of room for improvements, there is little or nothing that works worse than before.

Not working:
-The Apps to SD card feature. (Although I have my library on the internal SD, so maybe those who have moved it to the external SD can also move their apps)
-The calendar sync, at least for me.
-The browser closing randomly (very very rare) without warning.
-Some apps not installing (those are apps that didn't work in Dingo, anyway)

Could be improved:
-The behavior of the arrow button when in landscape mode. It should move to the next part of the page; or at least, it should move always to the top of the next page.
-Annotation in landscape is not a must, but it would be nice.

In any case, I wouldn't call the landscape mode a "crap" as I've read; and while Ermine is clearly a beta, it doesn't mean that is worse than Dingo. And in any case, Entourage has released updates that weren't that polished neither. I've not found e-ink problems such as the ones present in Dingo 1.10.