I have been using the Databank wrist watches by Casio since last few years. I have had two models and repeated the second one. The thing I liked about them was that they had telememo and schedule (50 in older model and 150 in the one I have now), world time and a timer in addition to regular features. Telememo and schedule really helps when one doesn't own a cell phone.
However there are a few things I don't like about those models especially the DBC-150 (warning: Macromedia Flash required). I have had to replace the battery after about 6months of purchasing all of them. After the change the battery runs for atleast one year. I know that the watch is there on the dealer's show case till it is bought and is always running but 6months for all three of them is a bit over the top. The second grudge is the low accuracy of time. The product page states the accuracy of the watch to be +/- 30 seconds! And that for today's standards seems to be quite a big error. I'm not that much concerned about this as I can refer to my PC's time for a more accurate estimate.
The third and the worst problem has been the wrist strap. I have had the databank model with the rasin straps but they become brittle and break after around 12-18 months of usage. This behaviour has been consistent for all three databank watches I ever bought. The interesting point about the strap problem is that no dealer carries the replacement straps. Every place I have asked has shown me options of Timex replacement straps (even they don't have one which matches the DBC-150). Why can't Casio either make better straps or provide the replacement? In case I plan to buy new one (as I did the last couple of times) there is the data problem: I have to transfer each phone entry and permanent schedules individually to the new watch.
So my advice to others is to stay away from Casio watches with rasin straps as they are going to break in around an year and a half or even earlier if you were swimming with them. What good is a watch if it not going to last for atleast 4-5 years!