Hey,
I searched for wordpress theme that can fit my criteria like ( mobile responsive , Clean code , easy to use and minimalist but gives you all the core benefits ) and there theme fills 95% of my requirement. The only problem was that I faced was that the mobile speed page rank was slow 71 % after all optimization than desktop which is 99% Proof in the screen shots. They should optimize mobile speed time.
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So, If you hesitating weather should you buy or not ,just ask them what's is your requirements and they will help in telling you the