This review concerns the original version and not the more recent G2 or G3.
I have bought a hand there are more than 2 years.
Good equipment, reliable and robust (all metal), much stronger than its equivalent Shure.
You can count on it: he does his job.
Extensive menu to configure both frequency sensitivity or transmitter output voltage (on Jack mono), squelch, pilot signal display types including the possibility of giving a name to the device commme JEAN3, etc..
He Posed home in his memoirs 8 frequency banks each with 4 channels compatible. If you want to run multiple systems, using channels of the same bank.
A ninth bank called U can be programmed to any frequency in the total bandwidth of the device (over 1000 possible frequencies).
If you want to run more than 4 systems together, you can program additional frequencies compatible, up to about 20 fréqueces.
Upon delivery from the factory, the system is set on Channel 1 of the Banu 1. Depending on where one is there may be a configuration to be done to avoid a TV channel that is active on this frequency.
Its only drawback is to use a 9.5 V battery that comes up quite expensive in the long run. Batteries Carrefour are renowned for being a tad smaller and better fit into the opening that the batteries of other brands.
There are 5 variants corresponding to 5 different frequency bands.
The large number of usable frequencies in each band can usually find a "hole" between the channels of television transmitters.
The presence of DTT channels is very disadvantageous because they leave no gaps between adjacent channels.
However, depending on the region where you are, the television transmitters use different channels.
With the purchase must therefore carefully choose the variant corresponding to a low number of television channels, especially channels TNT.
Luckily mine is in the lowest band, and in my region there are very few TV transmitters in this band.
This is not the case elsewhere.
Generations G2 and G3:
I also own multiple systems SENNHEISER G2 version. The same problem exists in choosing the best band for a given region, though they have more frequencies posibles (1440 and 1600) and thus more options to avoid TV channels in the region.
The main improvement is to use 2 x 1.5V AA batteries instead of 9.5 V for the same period of autonomy.
G2 version brings some improvements in detail, more or less useful, or that do not work as SCAN.
The interest of the G3 is automatic transmission settings of the transmitter to the receiver via infrared transmission, as already Shure.
Another improvement of detail: the transmitting antenna is clearly separated from the body (sum of the Shure) which avoids the hand and bring it to lose in emission efficiency.
Conclusion: The original version is quite usable and can be bought second hand if the price is right compared to more modern versions quite expensive.