Pros
It's not a pro,but let me congratulate some cheap people in the zen technologies that are working hard to keep every day a positive review under zen technologies with different mails,to lift the rating of zen.shabash atleast u guys are consistency in it atleast.
Cons
I just want to inform here that may help atleast one who r browsing to see the reviews to know about zen.please don't trap by looking almost all positive reviews of zen here,iam saying right they are all reviews kept my hr dept of zen itself with some diff mails just to cover their negative reviews in Glassdoor.Nothing is right that was mentioned in those positive reviews,u just think and see ,no positive review got helpful,but if u see negative reviews that all have atleast more than ,five helpful comments,that says about it.This is a trap company and they only know to torture employees.Better before joining here just try contact any one u know who is working or who already worked and get correct feedback from them and join.