I am very happy with this watch, as I have been with previous casio purchases. I have owned another model wave ceptor for about 4 years, and have never even changed the battery. As for band adjustment, it was a snap after watching the video on YOU TUBE.I took out 4 links in about 15 minutes so the watch would fit a young boys wrist. Also, I have made many purchases at AMAZON over the years, and every one of them has been a very positive experience. Every thing that I have bought has been a quality product @ a fair price, or AMAZON has accepted a return with no questions asked. This is better than my experience with some local merchants.