I wanted a theme that was able to allow users to add to the deals page and I got that with this theme. I was able to also, from the backend, edit the submitted deals. Everything else is standard, such as the link with purchases and links etc. Customer service is good and I got more than enough help when needed. I was given codes to customise some features. Obviously this was within reason and I have not had to use a freelancer as I have done with other themes. I would recommend this theme if you are looking to use it for the same reason why I chose it, which is to allow users to edit their own deals page. I have not explored other things to comment on extensibility.