I decided to replace my now 10 year old 500's with the new 510's in black to get something different.  I am a forever loyal fan of this style of shoe/boot.  As others have noted, they can be mixed with jeans, khaki pants, etc.  I would not wear them with dress clothes, but someone might be able to get away with it.

These are hard wearing, well made, and are great because they are almost an "anti-style" so they never go "OUT of style"!

The sizing can be confusing, but this line of boot is very consistent with sizing.

I am not such a fan of Amazon for buying shoes because if they do not fit you have to pay for return shipping.  Beware.