The available adjustments make these shoes very comfortable. I have very narrow heels, and the ability to adjust the heel width of the shoes so my feet don't slide around inside is great. Also the air vent (open & close) in the sole of the shoe keeps my feet cooler in the summer (open) and dry in the winter (closed).
Sidi's are expensive, but at this sale price, are worth the cost
I have the equivalent in MTB shoes and so I bought these for my road bike. The BOA system is so much better than the ratchet system and can accommodate double socks on those cold winter days. My only complaint is that the left shoe needed hundreds of miles of break in before the leather tongue was soft enough to be considered comfortable.