Great: 1. The size is compact and it is lightweight, ideal for taking to class or office. 2. It has the exact specifications of calculator allowed for exams. Perfect for practice. 3. Keys are super sensitive, you can type very fast on this and it picks up the numbers entered perfectly. Especially if you double or triple tap the keys, it is absolutely accurate. This would be priceless in exams. 4. Previously I had a Casio DJ-120D, but I feel this is the best calculator for one hand use, even though it does not have a 000 button. The typing speed easily compensates for this, and the closeness and layout of the keys is perfect.
Scope for improvement: 1. The viewing angles. You can't discern numbers too well from an angle. However, you should have no problems if you view almost directly from above or a natural 45° angle. The display of a DJ-120D allows for a much wider viewing angle, meaning you can operate it at some distance. Please note, I am comparing this against a 7 year old DJ-120D which is itself an allrounder.