I like how easy it was to setup my ESP8266 modules with blynks API keys.The app itself has no bugs at all when using blynx as an SDK.I have used this for creating some simple applications such as temperature sensors and other things which are very useful in remote locations where internet access would be limited or not available. The only downside i found about this application is its price tag but nothing much else really! You will need alot less time than if you were doing everything yourself just learning what your doing etc. This allows me to do many more different types of work while being able to learn new skills.