I bought this watch and also Casio's MQ247B analog watch. Both have stickers on manual booklets saying they have mercury (element Hg, does not say how much) in them! This may be just fine for many people but I try to avoid encouraging use of heavy metals in watch design. Specific to this AQ47-7E dual watch, the screen is made of soft material (acrylic?) and is raised so it will get scratched very easily. The construction of the watch is ergonomic, clean and light. The rectangular watch body is a bit narrower on the sides than the round-faced kinds, making its sides streamlined and not get in the way of wrist bending.