Great Radio, both the Sensor and the React. The React is the newer and if left hand is not needed then I would recommend it.
You've not heard of them since they are fairly new to RC and exposure has been minimum. They do however have a long extensive history in Radio Control primarily in Military applications such as obseravtion drones and such. They are very well versed if not the originator of 2.4Ghz. They were also the first to use frequency hopping.
The only problem I've ever had is with static charge during the early season return to carpet and then only on 4 cell, careful antenna placement cures this.
They have been swamped with Military business most of last year so RC hobby productions was drastically slowed and availablity is slim but they are filling orders as fast as they can so if your patient you could have the lightest most advanced radio out there.