Knee/Hip alignment requires very high precision alignment- MAKO conquered that by allowing surgeons
to build up virtual boundaries on/around the joint/s, then burr very effectively and precisely guided by the virual boundaries in real time (the robot soft stops at the virtual boundary) and this is why MAKO is winning.
Knee (partial or full) and hip (which is very alignment senstiive) require guided precision which only scanned/sensed virtual boundaries and guiding software controlled robotic arm can deliver. Or else you out and seek a 40 year experienced surgeon who has performed 20,000+ surgeries and is a master in precision surgery.
Look, few people will argue against the benefits of technology-assisted surgery (and there's a name for those people...they're called fools). Also, few people will fail to acknowledge the quality of Mako's technology, while being objective. The problem is not the product, it's not the technology, it's the way the company is ran. These dudes are not business men, they are doctors. They need to bring in a specialist CEO to make the right business decisions. You can't have a CEO who talks using "you knows", trying to articulate a business plan and sell to the Street.