The buttons definately don't operate too easily.. My hands were sore after trying to enter the damn Pin code... This computer should definately come with a computer interface and software standard, no extra charge which it doesn't.. It would make programming the computer much easier since its not the easiest coimputer in the world to program, but it is manageable once you are familiar with the unit...
I just wished the unit had a larger screen since the case can take one.. if they were going to use such a small display they should have made the computer smaller. I also hope they fix my 2 main complaints, 1 - being able to shut off deep stops when necessary so you don't get the damn "use tables" message as often, and 2 fix the major error when running in PO2 mode and the calculated PO2 of the diluent is higher than the actual setpoint.. The computer uses the calculated PO2 not the actual!!