I have the ZX model, and I sent it in this past April to upgrade to the Z4 chip and the internal wireless. I also added 6 more pads.... now I wish there was room for 12 more, lol!
I gig out anywhere from 2 to 6 times a month. I previously used the merge box with no issues. I went wireless for more portability. I was uncertain before I did it if it was worth the $$. Wow.... I am 150% certain now that it was. I carry all my cables, an extension cord, a light (for the music if needed), extra cables, a headset, a mike and mike cord, and even a Humdebugger(for that occasional annoying 110v cycle backround hum, which this eliminates) in my backpack, along with a small case I use for the MIDIJet wireless transmitter, batteries and power cord. I also carry my merge brick and cables in the same pack, wrapped in a plastic bag and tucked way down in the bottom, for that "just-in-case" moment. I use a Roland TD-10 for sound.
OK... I would NEVER go back to being wired! The freedom this allows is incredible. I have become the soundcheck guy in the band, cuz I can stand out front and listen to the sound while playing! The internal wireless setup is terrrific, and I use the batteries recommended by the Inspector (iPower Li-Polymer), which last anywhere from 6 to 10 hours and are rechargable. I have never had an issue with the setup. It is easy to change batteries in seconds, and it is so much easier to wander around! I highly recommend that when/if you decide to purchase a zendrum, pay whatever extra the costs are, and get the wireless internal, and extra pads if you can! You will not regret it.
On another note, I have not yet subscribed to Drumwagon's software but only because I am currently trying to figure out different settings for my ZX, along with the Roland module. I have been trying different setups, and find it difficult to change the way I play, but I need more flexibility since I added new pads. So, I am trying to work out a better setup. I plan on purchasing the software in the next week or two.
Rob - how do you set your pads up? I like the idea of playing my kit with one hand, and percussion etc with the other, and I am having a lot of unproductive moments trying to get a better setup. I like some overlap with the snare/HH/bass drum, but not too much. I want a lot of percussion instruments as well, thus I added 6 pads. I would love to figure out a better system. Perhaps you can relate how you set yours up? I am also pretty thumb heavy!