Hey, anyone out there used both HVAC Calc and Wrightsofts programs. I'm wanting a comparison and I've seen everyones thoughts on HVAC Calc. I would like more input from people that have actually used Wrightsoft (more than once or twice) and what they really think of it. I have a demo disk and it looks pretty impressive. I realize the price is high but depending on the modules you buy it doesn't look to bad. I can afford either one but if there is alot of negative feedback about Wrightsoft I may not want it. Thanks in advance.