I do not think I can recommend Appcelerator at this point due to the issues with Appcelerator studio, lack of good debugging support, lack of thorough documentation and forums and the additional cost overhead of licenses. The pros are just that it allows for cross-platform development. However, Cordova does a much better job of it and excels at places where Appcelerator currently struggles
It's great to develop business applications. Previously, we tried different technologies but we find it the most suitable for us. We also deploy a generic backend so we don't need to install anything new to implement new applications. This helps us to develop very fast and with very low effort.
It is very hard to debug your code. Breakpoints never worked for us even with the latest Appcelerator Studio and we had to rely on log statements to debug.
There is a need to purchase licenses from Appcelerator to run the code on a device or for creating iOS distribution builds. This is an additional cost when you have already paid for Apple developer program for precisely these things.
If things are broken due to lack to support between Appcelerator and a new iOS version, you pretty much have to rely on a new version release from Appcelerator for the issue to be fixed.
It is difficult to create enterprise distribution builds where the distribution certificate is owned by your organization's team and you only have a development certificate for the same.
The forums on developer.appcelerator.com are seldom helpful. It is hard to find solutions for issues even on other forums like stack overflow.
Appcelerator makes you write a structured code whereas Cordova just packages your code and you are free to structure it. Appcelerator bridges your javascript code with native code and that would make it run faster than javascript code in Cordova apps. However, with recent mobile browsers, you would hardly notice any performance deterioration with Cordova apps. Appcelerator struggles with issues related to its IDE, debugging, documentation and forums and additional costs. Cordova makes it much more simpler to develop cross-platform apps with better developer support, debugging support, documentation and forums minus the additional costs.
Each of the above platforms offer a specific solution. Sencha provides a complete solution that is a library of components as well as a framework to modularize your application so that it's better manageable. Once you get over the learning curve of the whole technology it's a breeze to implement new functionality within the application. We have an aggressive client who comes to us every other day with some new requirement, and sencha has been able to answer all of those without issues.
We were able to build and deploy a mobile app with Appcelerator. However, the platform still has issues and does not cover our needs as much as some of its competitor like cordova does.
