I have probably somewhere in the ballpark of 80 of these installed ranging from 2.5 years old to present. I have only had one true failure so far and I am partly to blame for that (dropped it about 7 feet onto concrete). I will say that in some locations they have a tendency to lose or gain about 15-20 minutes per year on the clock. As for overall performance, it's really hard to knock them for the price. They do what they say they will do and save a lot of service calls for adjustment and power outages.
I warranty them all for a period of 1 year and that's it. Intermatic has been pretty specific in recent packaging to include in large font "INDOOR" timer on these. Yes, they are housed in the transformer and could theoretically be considered indoors, but I still don't really believe that is a fair assessment. I would be hesitant in Canada where winter temps are 35-40 degrees below zero for extended periods of time in winter. I tell most customers who buy these not to expect much more than 2-3 years out of them. The amount of service visits these things save vs. analog timers over the course of 2-3 years causes these timers to pay for themselves 3-4 times over.
Lastly, Intermatic does have the true outdoor digital astro (which you probably know, but others might not). It doesn't mount inside the trans, but actually side mounts next to it with a double receptacle. I actually like these even less for multiple reasons, but my biggest beef is the fact that both of the outlet receptacles are open air and not covered. How can it be rated for outdoor if the outlets are not protected from the elements.