After using other wireless systems in the past which either ate AA batteries or lacked range and suffered from interference, I needed a system which was both rechargeable and had decent range. And the Shure GLXD16+ has it all.
Its metal construction of both the pedal and the guitar pack are both rock solid and will last for years. The pedal fits nicely on your pedalboard and has a built in tuner, so can also replace your tuner pedal if required. The Shure guitar pedal has a handy input jack if you wanted to just plug your guitar into your pedalboard and not use wireless for some reason, but with around 11 hours of charge on the guitar pack, its got plenty of power for soundchecks, gigs and plenty more.
The clip on the guitar pack does seem a bit on the flimsy side, however its holding out OK so far, but it might need a strap pouch to hold the pack at some point. The cable is also good quality, however I have bought a spare cable just in case of emergencies.
With the system using both 2.4Ghz and 5.8Ghz, I'm yet to suffer any dropouts, either with other wireless systems in the band or from interference from wi-fi, mobiles etc.
Whilst it might not be the cheapest system around, in terms of quality and features, its second to none. I'd definitely recommend checking it out - you wont be disappointed.