Bay coolers

Has anyone had experience with bay coolers like the 'Antec Cyclone Blower' or similar gizmos? Would they do any good for helping to cool HDD in a mobile-rack? What's the best one for 5.25" bay?

Havent used one of those pci exhaust blowers for nigh of 8 years or something. Yeah they do the job at removing a dead spot of heat in a case. There is a 5.25 bay rack by coolermaster that has a 120mm fan at the front with 3x 3.5" bays for hdds etc. They work pretty good - very similar to the antec 9xx hdd cage setup.