I like it but am with the naysayers about it's performance as a technical biking top (when I'm wearing it). Doesn't shift the moisture that well, subsequently making it cold wet and uncomfortable. Don't get the same experience with synthetics.
Best thing I've got is a Groundeffect heatwave top (Submerino http://www.groundeffect.co.nz/product-detail-SUB-WIN.htm) that's a bit of merino mixed with a bit of synthetic:
"A bi-component knit combining 62% Merino wool and 38% Polyester. This hi-performance thermal bodywear utilises the unrivalled properties of superfine 18.5 micron merino against your skin to wick away sweat, while the polyester provides a durable, non-pill outer. Light 'n' tasty at just 190gm/m2 and machine washable."
So I'm confused, where should my loyalties lie?
If Ton's a Clydesdale then I always thought GE stuff was sized pretty large (defo' their shorts).
Anyhoo, all this dogmatism about base layers. Internet-warrior-tastic.

