I like that it's easy for me as an SEO specialist who is not familiar with JS frameworks (like React) but still needs good results in my campaigns to use this tool! It works great out of box without any configuration needed from our side so we can easily integrate into existing projects which are already using angularjs/ember js framework. The only downside i see about pre render service is its price tag compared to other similar services available online at present time. But if you're looking just for simple solution then definitely go ahead because there will no issues after going live once implemented successfully :) We were facing one issue where google was crawling pages very slowly even though they had all necessary meta tags set up correctly along with canonical links pointing towards correct page URLs.