I was wondering what is a UpRev ROM editor

UpRev ROM Editor is a piece of software from the company Uprev. It has different uses depending on the license you buy. If you buy just for the tune, along with a cable, it allows you to flash your ECU and also monitor the engine.

If you buy the Tuner license, you can also use it to edit the ROM on your ECU, and thus tune it (tweak fuel delivery, timing, etc)..

Is it worth it for use with the cvt? I have a couple tuners near me that say they do uprev but do the pros outweigh the cons ?