Go true to size (ie I am a true size 9.5 so I buy my 1500s in a size 9.5)
Comfort Factor Ratings:
Cushioning (Softness): 3/10
Stability (Firmness): 8/10
Cushioning to Stability Ratio: 3:8
Midsole Shape (Foot support): 5/10
The 1500 is not too comfortable. It has a good amount of stability and support, but little cushioning to back it up. It's ok for a lifestyle shoe, but not if you are on your feet for long amounts of time.
The 1500 features ENCAP in the midsole.