[ARolek]

I use Sencha Touch on a daily basis, and have used it since version 1.0 (v2.0rc is now out). Clients love it because it comes close enough to native performance for data presentation apps. I also enjoy writing apps entirely in JS. I have also learned a lot about JS reviewing the source code.

The biggest downsides of Sencha Touch I see are: 1. Initial load. The framework is pretty large, even compressed, but CDN, gzip, and cache.manifest files help

2. Device support. Right now they they only support Android and iOS, but this fits the majority of my target.

3. Learning curve. Coming from a jQuery background it took awhile to understand their approach.

I love jQuery for desktop dev. When I tried a previous version of jQuery mobile the experience was not as good overall as Sencha Touch. Looking at the release notes for JQM 1.1, I will be giving it another try.