"I can't say enough good things about this software. No learning curve, no bugs, no tweaks. It's very intuitive and behaves exactly how you would expect. What's great about this software is the return on investment is immediate. The list of small utilities I have purchased in the last few years has been very short. I'm not what you would call a utility freak. TreeSize is on my shortlist. I purchased TreeSize Pro and am now a happily registered user."
"Here are just a few companies that use TreeSize Professional - Adobe Systems Inc., AT&T, Airbus, Allianz, Axa, BP, Bank of America, Boeing, Chevron Texaco, Citibank, Compaq Computer, Credit Suisse, DaimlerChrysler, Dell, Deutsche Bank, Deutsche Telekom, DHL, Dow Chemical USA, Dupont, Ford Motor, Fujitsu, Siemens, General Motors, Harley-Davidson Motor Corp., HSBC Bank, Hewlett Packard, IBM, Intel Corporation, LG Electronics, Lockheed Martin, Lucent Technologies."