brett_colv2126859wrote a review of Icebreaker BodyFit 200 Oasis Crewe - Long-Sleeve - Men's on December 30, 2010
The Bodyfit 200 is definitely a dedicated baselayer. Personally, I wish it had been designed a little more like the 260 crew in terms of fit, because the 260 looks great as outerwear and is far more versatile (which I think is important given the cost).
I will mention here that I'm not quite sure how Icebreaker sizes their stuff. I wear an XL in almost everything - Arc'teryx, Smartwool, Mountain Hardwear, Under Armour, Patagonia - it all seems pretty standard. Putting on the XL Bodyfit 200 made me look like Ralphie's little brother in A Christmas Story when his arms stick straight out to the sides and he flops around like a trout on an ice sheet. The XXL fits snug, like a compression layer.
I do like the 200 as a baselayer though. The feel is excellent, it's comfortable, and has all the properties that make merino great.
Overall, I think I prefer the Smartwool NTS crew to this particular product - based entirely on my personal preference for fit and cut.