my first pair of shoes were sidi ergo 2's. Great shoe, very light and uber comfy. My toes were right to the toe because that what I thought was needed since it was my first pair of shoes and the salesman told me "you want to make sure you have no extra room." I took that to heart and I guess I didn't think about needing a thicker sock or needed room for my feet to swell. I rode those for a year until I couldn't take it anymore.

Went to shimano because it was a wider shoe and bigger toe box. 43.5 I had heel slip so I figured go with a 43 and I wont have the slippage. felt great, but even on the first ride I could tell I was gonna run into the same problem. I just losened the mid and toe velcro as loose as possible and ran with it for another year.

Got a killer deal on another set of shimano's but went with a 43.5 thinking that would help. nope either shoe didn't fit me rigt all together OR still wasn't big enough.

Just got my specialized S-works shoe and got back from my first ride. Not only does it make a huge comfort difference, but the S-works shoe is so magically comfortable in them. Seriously, its like my feet are running around disneyland the entire length of my ride!

For those of you who may be in the same boat, go up a size and have some room. If you really want to take the win, get some S-works shoes!!!