We have taken support for various requirements (not issues) and delivered the projects as per our requirement.
What i liked in Mythemeshop.com
1. the support platform (https://community.mythemeshop.com) itself is completely equipped. It has a facility of forum, knowledge base, tutorials and most importantly when raising a ticket facility to leave confidential information (WP dashboard user name / password credentials, images) etc. in a separate space that can not be seen by public.
2. The great search facility, some of the requirements I found on my own through the questions already answered in Forum section
3. One can expect quick response for sure. It's very reliable.
Thank you Jitendra & All support team @ MyThemeShop.