First let me say that I'm new to Shopify as well as Envato. One thing I've noticed is that a lot of devs seems to offer deals to people that give them 5 stars. So... The star ratings here may be inflated.
With that said, I will say that 100% my review is based on my experience with HaloThemes and they didn't do anything more than offer a great theme and amazing support to earn this review.
I'm in the process of making quite a lot of changes to Blackdeers theme. I picked it because it seemed to offer a good platform with key features (sticky mega menu, etc.) that I really wanted.
I've been pestering them often with a lot of questions about what css does what, etc. when I run into a block. And every time, they not only respond, but just today actually sent me a screen capture video of how to make the change!
So, while I think they are in Vietnam, thus there's a time and language barrier to the US, I'm astounded at the level of service and support they offer. Especially for the price!
I've spent more on a dinner than I did for this theme and got worse service.
Keep it up guys! I| look forward to working with you more in the future!