At first I thought the configuration seemed a little daunting but when I went to to developer's site there were more than enough examples from which to copy and paste from. On the plus side, the options to allow you to customise the extension to how you want. I also noticed some weird graphics appear on the map but an email into support and they informed me of a conflict with the font resizer I had on the page. I did find the support very timely, accurate and you feel the developer is passionate about his work. A very good extension with great support that I will keep in my portfolio as a must have rather than a nice to have extension

I have used quite a few extensions and tried most of the other form extensions but think this is the best one for forms available thus far. It allows you to create forms in your usual form building programs and copy and paste the code. So you can stylesheet and build any specific validation rules you want.
Some of the entry areas are a little less than intuitive at first and this is where I think the developers can do a little more work but they do have video examples of how to get started and and also have a very responsive forum area where answers are very quickly available. Also the way they have developed this extension does mean there is a lot of customisation you can do to meet your specific requirements. I think the team at chronoengine have done an excellent job and this is certainly one of my most favoured extensions