Have used almost every single VL device on the market, except the intubrite. I don't know of a single service that is carrying/using them unfortunately. Would be curious to what you find out. Everyone around here jumped on the Glidescope bandwagon when they first came out. I am a CMAC fan all day long and it's our device at work. Ever other device I have used is inferior in either quality or ease of use to those two devices in my opinion....