Still getting semi-frequent swaps back to the stock keyboard, though this annoyance is worth the trade-off to use a better keyboard.
Tried all of the major ones apart from Minuum (Swiftkey, Swype, Fleksy, and stock), and Swiftkey comes out on top overall IMO. Fleksy is a pain; stock feels sluggish and I tend to make bigger, uncorrectable typos on it; Swype's swiping works the best, however otherwise it is sluggish and unresponsive, and uses a very strange layout compared to stock and the hold-down for punctuation is pointlessly long. Swiftkey has the best autocorrection (though stock still has the best prediction) and is certainly the most responsive. While its swiping isn't as accurate as Swype is gets me by.