I´ve experience with Tobii Eyetrackers but not specifically this one.
Kind of expensive gut quite good opportunities.
I also did mobile eyetracking testing with Tobii Glasses and SMI Eyetrackers.
If you can effort the money Tobii isn´t a bad choice.
Just before you choose to do eyetracking think about if the questions you answer can really be answered by this method. If yes it´s supercool and fun to do. In the last years system got better and better!