1. the ergonomic structure of the handle to cater for all types of gender, age and medical condition
2. the graphical representation of the app (UX) for all level of tech savviness (including those with poor literacy / poor eyesight)
3. the high sensitivity and durability of the device for continuous usage
4. the simplicity in setting up the system to promote independency (without supervision) for home-based rehab program
5. the cost effective and affordable price compare to commercially available rehabilitation devices