i had a mouse from logitect. and it goes like bought it on 1-1-1995.
broke on 1-3-1995. then got a new one at 1-4-1995.
broke again on 1-7-1995. then got another one. and that one lasted for like 5 years. and then i bought a new one because i wanted to.
so sometimes thing break very easy. it a bit of both i think:P