It seems to work well. Hope it has long life. The zerk fittings seem to be there for decoration only. No real way for grease to enter bearing that way but they look good. The casting looks to be real good quality. Nice and heavy.
Edited 12/20/13 Changed to 5 stars Upon further review I realize there is a groove for the grease to move around and enter 2 holes on the bearing. The bearing on mine is crooked so I straightened them out so the grease fittings should work after all. No need to use a shop press to pop them out. Just tilt the bearing past a certain point and it will come out of the open part of the grooved area on one side.
Update 06-24-17 Still working great. Used for a belt system for woodworking. Will order again if I need them again for another project.