Ted, We have Gyro Gales aboard ADIOS!, our 48' DeFever and couldn't be happier with them. They do WORK!! Maintenance is extremely low, just change a couple of filters and o-rings yearly. They were on the boat when we bought her, but would go for Gyro-Gales again in a heartbeat. Call Magged at GG, he knows his stuff!! Sorry, don't have any experience with Niads but the pneumatics of the GG's seem much simpler than the hydraulics of Niads. Good Luck!! Randy Jacobs, ja447@ix.netcom.com 48' DeFever, ADIOS! Port Clinton OH, (Soon to be Charleston SC)