Pros: Quality, Easy to use, Features, cost
Cons: no major improvements over 5500
This is a pretty solid helment, but its not great and not much of an improvement over the 5500.
I have been really happy with my 5500 and bought the 7500 simply due to availability. I wasn't expecting miracles, but as the higher numbered replacement, I was expecting some improvements. There are a few changes, but they are minor and do not add to the performance or functionality of the helmet. The only potential upgrade I can see is that the vents are reconfigured and slightly bigger. This hopefully will lead to better ventilation, but I have no complaints about the 5500.
In summary, if you like the 5500, you'll probably like the 7500 too. They're essentially the same.