We have been using their tools for over a year now, and we are very pleased with them. The cost is a fraction of what the competition is charging. They work great, they look nice and it reduced our development so that our project was completed two months before expected, even with learning the new tools.
The learning curve is a little steep, but that goes for any of the comparable packages. The tech support sucks, by email only. When we first purchased it they had a support forum and you could find most of your answers in the forum, but sadly they did away wit hit. Now it takes a few days to get a response. But when doing an entire application, we had plenty of pages to work on while waiting for responses. Most of the time they pointed out the problems or told us how to resolve them. And I sent them many messages telling them to disregard previous queries, having found the answers on the internet.
Their examples are simple, and if your needs are simple they will suffice. If building a full-blown application to replace a legacy application and run your business, such as we did, you need better support. Still, it was money well spent. We use the grid and filters to perform searches on our client database of 200,000 records, and can usually find the person we need in less than 10 keystrokes by name alone. Performance is very good on our intranet.
I will note that when I thought I had found bugs in the software, it was just me. A comma where a period should be, bad capitalization, misuse of functions, etc. Javascript is very sensitive with it's syntax and not friendly with error messages, so much time was spent going over code to discover the not-so-obvious errors.
And our demands are probably beyond most peoples needs, our main screen has a combination of a superform and 7 data grids, each of which pops up a modal form for data entry, all within the same web page. But it does the job well. All in all, we have about 60 data entry pages and another 60 reporting pages we created with the oBout tools. The reporting pages allow the users to set report criteria (i.e. dates, clients, products, etc. using popups, calendars, radio buttons, etc.) and pass these to SSRS reports, a sort of ad-hoc reporting. So we created a projects with over 125 web pages and over 150 reports in less than one year, quite an achievement considering the small workforce.