I'm currently building funds to buy a World Timer. I'm far from a wise WIS, but my thoughts are:
1. Very well made - they look and feel like a quality piece
2. Possibly a bit expensive for a modified ETA, but reasonable discounts can be had without too much effort
3. Customer service appears to be a priority for them - there are many stories of repairs turned around in days, straps being replaced etc.
As a brand they seem to divide opinion on here, but then everyone is entitled to an opinion. Mine is that they make good watches, and whilst the various tie-ins are mostly marketing guff they do provide interesting facts to bore your friends with.