I've checked Hawaar thoroughly. It seems quite interesting from home page which lead me to sign up. I have found the following:
About Layout -> Layout is neat and fresh. It's creative, I've NOT seen that kind of layout before. It looks very light, flat and features are arranged very properly. I can see all the stuff during very first glance.
About UX -> I've checked Hawaar on desktop, laptop, tab, smartphone (iphone, note5, samsung galaxy j1 and htc). I've found it smooth and user friendly. I liked it using on tab and laptop more than any other device.
Who can use it -> I would say teenagers. It's safe too because users can have full control to see the details of senders who post compliments/complaints and consider them Angel or Devil.
Junk. They came here messaging people individually asking for people to like and review it. Avoid.
Our users have written 2 comments and reviews about Hawaar, and it has gotten 11 likes