I'm looking at them because I've read that they work well in sunlight. Any personal experiences?
Spin 'round carousel when your horse isn't screwed in.

My band:
Fractured Instinct
(For fans of Death/Groove/Prog Metal)

Ibanez RGA42E
Ibanez S420
LTD H-301
Ibanez RG520
Peavey Predator USA
Douglas Grendel 725
Line 6 Pod HD500X
I love my TU-3. If you want to get any tuner, and set it up for sun, just put a piece of cardboard or something behind the tuner to block the sun. Just give it a bit of shade so you can make out the note on the tuner.
This post may contain my opinion and/or inaccurate information.

Current Rig:
2006 PRS CE-24
Mesa/Boogie Mark V
Voltage S212 w/ V30's
Strymon Timeline
CMATMods Signa Drive
TC Electronics Corona & Hall of Fame