Anybody have any experience with durability of Elgin-Butler glazed bricks in severe weather areas (I'm thinking Chicago, Michigan, NY, etc)?  They have submitted excellent test results (including 650 freeze-thaw cycles without failure, and very good IRA and COS numbers) for one of their glazed brick, but would REALLY like to hear from (or of) somebody who's got this brick installed in the weather.  We understand (from the brick salesman) it's used in Chicagoland subway stations, but whether this is indoors or out is unclear.

Thanks.

Ralph