Richard,
Are you paying money for it ?
I am using the free version. The monthly paid subscription is moving to
only annual next Month, but will also come with access to more features.
Too spendy for me -- I am staying with the free version.
Choice of development environments depends heavily on what you are trying to
achieve. Most cross platform environments will create what amounts to a web
app which runs locally. Most things run via HTML5/CSS and pretty much
everything is in essence a web page. This makes it much easier to support
multiple platforms.
Appcelerator is different. It creates iphone apps using "native UI"
controls and the compiled XCode project it creates does not have any *.js
anywhere to be found. This can help protect your IP if proprietary beyond
the minify or obfuscation of the *.js you may try with other environments.
Each environment has its own virtues. For my purposes, I chose
Appcelerator.
midrange.com
