There are several reviews of the antenna on Eham reviews. I bought the old mini products version of this antenna used in the summer of 2002, to replace a Cushcraft MA5B. Due to its light weight and size, I was able to mount it slightly higher than the MA5B, but probably not significantly.
I had one of these antennas back in the mid 1980s, but honestly can't remember how it did back then. How does it do now? Now it isn't going to outperform a full size tribander at 80 feet, or a series of monobanders, but for its size and weight, it really gets the job done. Mine is mounted at around 30 feet, using a roof tripod on the top of the house, and a radio shack TV rotor to turn it. So how does it perform? Well, I have worked arond 275 countries with it, just running 100 watts. I did 845 QSOs in the 2002 Ten Meter Contest with it. I worked VK9XD with it in 2004, and that is a 10,000 plus mile path from here. Worked 3Y0X on 20 SSB, 20 CW, and 17m CW with it. It isn't rated for the WARC bands, but it will load up there with a tuner. However, the directionality of it gets a little screwy on the WARC bands. Just rotate it to peak the signal. It has a small footprint and can be rotated with a small rotor. The item "MQ-1 Four Band Hybrid Quad Antenna Beam Amateur Radio" is in sale since Monday, May 16, 2016. This item is in the category "Consumer Electronics\Radio Communication\Antennas\Ham, Amateur Radio Antennas". The seller is "ply1940" and is located in Bathurst, New Brunswick. This item can be shipped to Canada, to United States.