I have Giro Empire ACC shoes which is very similar to the SLX but slightly heavier shoe. I like them. I have only worn the fizik R1B in my LBS trying shoes on. I did not like the R1B because no matter how tight i got the shoe my heal would move up and down in the shoe which i heard is a problem for some people with fizik shoes. I read that people find the Giro shoes a bit narrow however this is not a problem for me. I did find the shoes a little small for the size and had to return the first pair and went with a half size bigger then you regular shoe size. I have ridden the last two years with them and find them very comfortable for long ride or short intense rides. I don’t race anymore but do fast local group rides. I don’t have problems with the laces. I grew up with laced cycling shoes so i don’t feel that not having the ability to adjust the shoes mid ride with a BOA knob is not a big deal. I am a big guy and don’t seem to notice the sole of the shoes flex at all. If i had to complain about one thing it would be the price of the replaceable heels.
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