Having already owned a Shure SM58 and other microphones I didn't really want to buy another just with wireless capacity, so this seemed a good option. The clarity of the signal is very good, with no interference. I've used it in large halls, and through walls with no problem with regard to range.
The link system works well, just press the buttons on each unit and they 'find' each other quickly. The transmitter slots into the XLR socket at the base of the mic - it fits securely but does stick out around the base of an SM58. USB charging is quick and easy. The base unit takes either two AAA batteries or use the supplied mains adapter (which was Euro plug, not UK, and required an adapter). Both transmitter and receiver feel lightweight and constructed of plastic, but at this price that's not a concern.