From what I understand about the Dobeck, you have to remove the tank to install. I just changed my cam tensioners and re-used old push rods so I had to remove the tank. Removing the tank was the worst part of that entire project.
I have a PCIII and for that I only had to remove the sidecovers, battery, and remove the bolts for the battey tray so it could be shifted. The entire process to install the PCIII took around 45 minutes, maybe a bit less.
I have never had an issue with the PCIII, and have over 20,000 miles in 2 seasons with it. So far I have used only "canned" maps. Initially one from Fuelmotousa.com where I had purchased the PCIII from, however I am currently using a map from Dynojetresearch, a supporting member of this sight, as Fuel moto did not have a map close enough to work with my current cams. Support from both of those vendors has been excellent.
The reason I would be reluctant to use a Dobeck, TFI is that it reverts your fuel injection to the range of adjustability similar to a carburator. Too limited of a range where the PCIII's range includes throttle percentages of 0,2,5,10,20,40,60,80,and 100% and allows fuel metering adjustability in reference to those throttle positions at 250 rpm increments from idle all the way to redline. It is a truly precision instrument. As well, the PCIII has an accelerator pump feature to simulate that of a carb and enables the user to tune out any hesitation caused by rapid opening of the throttle.
The PCIII also allows for adjusting of the timing in the same increments as the throttle for both percentage and rpm. To top that off, you can adjust both fuel and timing for front and rear cylinders indivually if you choose.
I guess you could say I am happy with how the PCIII performs and impressed at its capabilities.