I bought this timer after buying over 2 dozen of the Woods 59377, they look identical as far as the programming electronics go except this one has a replaceable battery, which is important because these are not backups or rechargeable as claimed, they are necessary to function. When the battery dies, they stop working.
I use timers in my restaurants to turn TVs on and off at set times. This model appealed to me solely because the battery was changeable.
I can tell you for me Woods timers have about an 80% fail rate within 6 months, usually due to the battery dying, but I have had several fail even with good batteries. The first one of these I ordered didn't work, but Amazon exchanged it and the second has been ok so far.
If you do get one that works for over six months, consider yourself lucky. I have maybe 3 or 4 that have worked over a year, the rest have all failed and been exchanged or trashed. Unfortunately this is still the best one I can find that is digital, and has 2 grounded outlets, all makes seem to be a little flaky.
You know you have a bad one if
1. Switch manually does not turn off or on (if it doesn't work manually it won't work on AUTO later when you need it to.)
2. The display has everything lit up or is garbled (if it does it once, it's over, it might work for a little while but will fail again soon)
3. Dead display - battery is dead (at least it's changeable for this model, not so on the 59377 white, it's done.)
It could really be a great product if it were more reliable, I mailed the Woods home company a box of bad ones a week ago with no expectations, I'll update here if they ever get back to me.