the corum is cool lookin, its very clean in its design.
and yup the FM's are great! the two that I had both functioned wonderfully just as gen and the movements were very good, over 40+ hours of PR, on a 21J!
but do keep in mind that there are 2 versions of the crazy hour, jumbo and small. the jjumbo is 55x40, which is really big. the smaller one is somewhere around 45x33 or something along those lines... They also come on a shit strap that is made for a 300 pound thug, meaning, the holes punched on the strap are for minimum 7.5" lol...
if your wrist isn't 7.25+" get the small version