I have been trying to create a instant price quote form for my commercial photography business. I had previously used RSForm!Pro by RSJoomla!, but found it a little too complicated and quirky to complete the quote functionality, so I simply gave up. (Note: RSForm!Pro is an excellent extension; I simply found it to be a little more than I needed for a basic quote form).
What I like about Calc Builder is that it is simple to use for basic calculators, but has enough additional capability to do some really slick things. For under US$30, it's really quite handy.
Moonsoft's support is exemplary. I had some difficulty getting started with my first calculator because the interface is different from RSForm!Pro. I simply created a couple of support tickets and a couple of forum posts, and I received helpful answers VERY quickly.
The only shortcoming that I can think of is that there is no way to design separate user and admin emails as in RSForm!Pro, which somewhat limits how Calc Builder can be used. That said, this is a great extensions and, for the price, an excellent value.
Thanks for the feedback umbris :)
I will add the acceptance of % values in the next release. And about the arrows, I feel that this is not a problem, if some other users feel so, I will change that too.
One of the features which I found to be very useful is the capability to have properties included in several categories, including nested categories. This allows you to create menu links to various categories and category groupings.
Currently the component lacks IDX capability, and has only limited ability to link menu items to searches, but The Thinkery says they are working on these features for future releases. In my opinion, they will then have a truly top-shelf product.