Personally, I have had much more success with LRP than Novak. I currently have 4 QC2's (once for each of my cars). 2 of these speedo's were from the original run when they were first intorduced and they run still perfectly and have been in my daily drivers since day one
I had the KO and Keyence ESC's. They were great but it was too much hassel to mess with programming for me. Most of the time you mess with the programming and the ESC just gets worse...at least in my case
If you like playing with that stuff, give them a try. But I would much rather just rely on choosing one of several factory recommended settings. Or in the case of the QC2, with the variable drive frequency, you cannot get any more custom than that and the ESC does all the work for you!!