I use Global most of the time, they're alright - they do me perfectly alright but I know she wasn't that impressed by them (or her chef mates), saying they spoil too quickly. Before Christmas I got a bit of a stupid head on me and spent a shit load of money on a ceramic knife, I love it. It is insanely sharp, lethally so - you really need to treat with TLC when using it and not using it.
http://www.kyoceraknives.co.uk/index.php?main_page=index&cPath=15
Far from cheap but they'll last me the rest of my life if I look after them so therefore they're worth it IMO.
Kyocera High Tech Ceramic HIP KYOTOP Sandgarden Series
HIP (Hot Isostatic Processing) high density blades - These blades are twice as sharp as a normal ceramic blade.
Elegant design coupled with outstanding sharpness.
Luxurious pakkawood handle that is both durable and moisture resistant.
The robust blade will hold its edge much longer than steel.
Completely stain and rust proof, these blades are impervious to food acids that commonly discolour steel.
The ceramic blades will not impart any metallic taste or smell, whilst maintaining the fresh tastes of food. Their use will also not brown fruits or vegetables.
Extremely easy to clean.
Non stick ceramic blade.
A joy to use, these knives are lightweight and perfectly balanced.
Peace of mind with the Kyocera 5 Year Limited Guarantee.