I love these boots. I bought them to replace an aging pair of Alpinestars.
Some of the other BMW boots run very large (e.g., Airflow 3) and leave your feet swimming in the boot of your usual size. I normally wear a size 11 shoe. I ordered the appropriate european size which matched a US size 11 and the boot fit perfectly.
These boots were recently put to the test in wet weather while on a trip through the Alps. The feet stayed perfectly dry during a full day of heavy rain.
The adjustable strap across the top of the foot is very effective at helping get a snug fit.
Although I've not crash tested these boots, they appear to offer excellent protection with thick leather and ankle protection.Rating: [5 of 5 Stars!]