ponybikewrote a review of La Sportiva Boulder X Approach Shoe - Men's on June 8, 2016
Familiarity: I've used it once or twice and have initial impressions
Fit: True to size
I just received these beauties. Bought size 43 instead of 42.5 based on reviews and am mixed on weather that was the right choice. I think since I am now old and will be using these much more for hiking than climbing approaches the larger size will be good. However, if you plan to use these for technical approaches or rock climbing I would go with your normal size. If they stretch or pack out they may need to be sized down a little more. Anyway, just want to point out that they seem to be sized appropriately for their intended use if you have a normal to medium volume foot.
Also, my first impression is that these are great and I wish I had them instead of the last 3 pairs of hiking boots/approach shoes I have owned. I will update once they get some real use.