After reading the advice I'm leaning in favor of a serial logger then should I switch computers, one that doesn't have a serial port I'll purchase a USB adapter, what do you think of that girls and boys?
I am one of those outlyers johnd mentioned that had problems with the USB logger. It's true that you are more likely to hear about the failures than the successes, and that is normal. Why would it worth discussing if there are no problems? But since it is
a potential issue it is worth mentioning that I am a career electronics professional capable of dealing with the issues (with a little support from places like wxforum) but would choose to buy the serial version if I had the money to do it again, because it was a PITA getting the USB version to work, whatever the causes for the faults. I managed, but I think about the other end of the spectrum of patience for technical problems and realize that someone like my father-in-law would never put up with it. Since it is a simple and seemingly reliable solution to adapt a serial-to-USB, for that reason I would tell my FIL to go with the serial logger. That's my personal preference based on my own experiences. Your mileage may vary.
I also think that with the USB version, you need to emulate serial anyway to use non-Davis wx software to dump the logger, but I could be mistaken. (Help me johnd)