This is very comfortable.  It looks better than the image shows.  I like that is is 100% Merino.  If you get the version without the hood, it is not 100% merino.  I had gotten that first and sent it back and got this one.  The extended inner sleeves with thumb holes are more comfortable than most, and I end up using them, whereas I don't use the thumb-holes is most of my merino tops.

I am 5'6", 155 lbs and the small fits well, but strangely the hood seems a little too small.  Most hoodies I have the hood is over-sized, but it this one is still usable.