Yes unfortunately I find the menu system a little cumbersome to use as well. The M settings seem to be only to store your Joules and temp setting into and work with the Eco, Soft, Standard Powerful and Powerful+ modes. When you use the SXI-Q settings the M settings are ignored as the curves you've set up will determine your Joules and temp settings. Plus the fact you have 5 SXi-Q curves to play with in each of the Configuration settings (C-modes) it gets a little confusing. What I'd like to see is the ability to select the C modes on the main screen rather than going to the menu or bluetooth app. And while you can rename the C modes on the bluetooth app the names don't show up on the mod. I use a C mode setting for each of my atomizers, and it would be awesome to have these names appear on the mod like you can do in Escribe with the profiles. Perhaps future updates will address this. Having said all that I really like the performance of the YIhi chip in temp mode. It's quite consistent and smooth.