Blink was my other option
If you are still considering Blink, here are some pros and cons:
Pros:
Cheaper, Battery lasts forever, Amazon owns it now, Free cloud storage, Works great outdoors, Timely triggers, Live view with one-way audio, Excellent IFTTT integration, Extremely reliable operation
Cons:
No native integration with ST, Amazon owns it (not sure what will happen next), Impending release of Video Doorbell, Need to use yet-another-hub, Only works with mobile apps