I can answer any questions you have.
We expertise on magento and we have strongg frontend and backend developers.
I can offer you quality code and fast development, so even if my bid has higher hourly rate then others, I almost shure I will cost you less because:
1. We have a lot of ready solutions, which we can implement
2. We have good knowladge of platform and big expirience, so we can develop much more faster then newbies in that pltform
3. Potentionaly when you hire low cost magento developers, you can get very bad quality code from them and when you store became bigger - you need to pay twice to rewrite all that things, as magento will crash or work very slow even on very good hardware
4. We have some expertise in server optimisations for magento projects
5. I can continue and continue )))
If you need any examples or any additional information, just let me know