I have bught this TV stick from amazon last week.It works great and easily anyone can operate it with basic knowledge.
Not essentially to by a smart TV, with this TV stuck my TV became a smart TV with voice access.
Most interesting feature is that this TV stick allows to install and run apps from amazone app store.
I felt very lag free and got quick response.But the problem is with battery life.Drains fast and extend up to maximum of two and a half days.
But anyway, positives overcome negatives and really a useful invention.