Oral-B GENIUS X Electric Toothbrush

I've been holding off writing this review to see if Braun/Oral B were going to do the right thing and ensure I received the product I paid for. They never did.To make a long story short, the Position Detection feature kept this brush in the repair shop more times than in my bathroom. It worked great for a few months, but then the Position Detection would stop working. When you brush, there is a "map" of your teeth and the brushing progress would show up as you go. However after a few months this feature stopped working entirely.Customer Service (CS) would blame it on my iPhone, so I tried other phones, loaded the Oral B app and it still didn't work. CS then blamed the app developer. So my wife bought exactly the same brush and it worked fine on my phone and hers. At this point CS had to surmise it was a defective brush (duh) and authorized a replacement.Over the course of 2 years (the warranty period) I sent it in 5 times. Given the shipping and bench time, I probably lost another 6 months so only got 1.5 years of actual use. Once the clock struck 2 years and the warranty ran out, CS refused to authorize any further replacement. At that point I asked what is the expected life for this brush and they said 3-5 years. But I only got 1.5 years, what gives?Now they're back blaming the app developer again with promises that the next version will work. It hasn't happened. Save yourself some money and headache and avoid this model if you want Position Detection. I ended up buying a lower version that has a slight different way to do PD, but it works fine and at a fraction of the cost. Good luck and happy brushing.