How many on and off settings does your timer have in all? The one that I bought has 20 sets of on/off settings.
Also DST it can get pretty confusing setting the timer unless you use a program to write the times down on so that you can adjust it to your needs. Also a good digital timer will have a battery backup system so if the power goes out (unlike the pin timers) it doesn't rely on the power to keep track because they will either have 2 button batteries or a AA or AAA battery for them. The one that I bought uses 2 button batteries.