First of all, I have to say that I am a fan of Casio, and how could I not be, since I was born in the 80s when Casio was dominant. I bought this watch for everyday use at work and I chose this one over the all-time classic f91w because of the illuminated screen. The watch is awesome. First of all, the positive aspects, the illumination is decent now, so at night the panel display is readable. I wouldn't say it's perfect because even though it's illuminated, the brightness is low. It is definitely readable, but low. Another positive aspect that you notice is that the finishing is better compared to the f91. Now, the downsides. Because it is illuminated, during the day the panel display is a bit darker and not as clear in the indications. It doesn't bother you, it's fine, but I'm comparing it to its predecessor. Another downside is that the strap remains the same as the old one, and for those who remember, we're talking about a soft but plastic strap that will definitely need replacement in a few months. And lastly, it is 1 millimeter thicker than the f91. For me, it's not a negative because it gives the watch a tougher feel, but it could definitely bother someone else. In conclusion, the watch is fantastic, and with a 7-year battery life, what else could you ask for?