Like everything, if it is more convenient and saves you time, you will have to pay. I have used it off and on over my domaining career. As others have said, you could probably find all of the same information, and you can do 20 free estimates a day on Valuate.com. But for me, my time is worth more than that and i like the convenience. They have a lot more than just appraisals and end user searches. Some of their tools are really useful for dealing with a lot of names. the data parsing and bulk domain checks are useful as an example. I just recently installed their Chrome widget and love it. No more going to their site unless I'm actively doing research. the widget lets me paste names in whenever and wherever i am for a quick snapshot of value, whois and trademark issues, plus more.