My EPO update experiences:
- Right from the beginning, I turned off the automatic update function. I almost always disable all automatic updates on all computer-related stuff, partly to avoid unwanted data traffic, partly to be in control of my gadgets.
- Under previous FP OS versions, right up to and including 1.6, updating the EPO files manually has been more or less impossible (after twenty-something attempts it has sometimes worked). The FP1-EPO app solved this problem.
- After upgrading to 1.8, the built-in manual update function works perfectly, no doubt because of the switch from FTP to HTTP as described by @keesj here. So the FP1-EPO app is therefore not necessary.
- I have not noticed that enabling (updated) EPO files delays getting a first fix. On the contrary: I normally get a fix within 15-20 seconds, while it takes longer if I disable EPO.