I have GS-911 since the spring of 2008 when I bought it directly from Hexcode. I have updated it (almost) regularly, and I will probably continue to do so even if it means paying a certain amount of money. I use it mostly on my bikes - R1200R and Dakar, before that R1200RT and F800S, and occassionally on my friends' bikes. I like to change my bikes(toys) every now and then, so when pro version was introduced, I upgraded my device, as it was not too expensive to upgrade. As I have no commercial use for my GS-911, I would probably be a bit dissapointed to pay more then the enthusiast user. Maybe the same amount can be charged for both versions, as I am sure, many of "pro" versions are not really used in workshops, and for those that are, well, good for them. I am more interested in the completely new GS-911 because in a year or two there will be some liquid cooled boxers on the used bike market, and then I might consider buying a newer bike for which I will need a new tool. Maybe, if I will have no need for additional functions, I might choose not to update for a year or two, until I get the new(er) bike/you provide the new GS-911. Whatever you decide I will remain a very satisfied customer.
Best,
Boris