I have a friend with a 2010 MDX and he loves it and zero issues to date according to him.....it's definitely the nicest SUV I have been in so far. It's probably the best product in the Acura fleet at this time IMO.
I hope they fixed some of the issues that people had with 2007-2009 model years. I've mentioned it before, but I have 2 coworkers with MDXs and here's the list of stuff per vehicle.
2008 MDX Elite (purchased brand new):
1. Bluetooth module went bad draining the battery. Replaced under warranty.
2. Adaptive rear shock absorbers worn out by 80k kms. Paid out of pocket for it.
3. Front wheel bearings worn out at 110k kms. Covered by extended warranty.
4. Timing belt tensioner replaced 3 times under warranty.
5. Steering system gearbox replaced twice under warranty.
6. Front adaptive shock absorbers worn out at 130k kms. Owner phoned up Acura Canada and complained about this. Acura Canada covered the cost.
7. Fuel injectors had to be replaced around 60k kms because they were leaking a bit of pressure causing weird start up conditions.
8. Rear main seal replaced twice due to leaking. Covered under warranty & extended warranty.
9. Acura dealer replaced the battery. Replacement battery was faulty causing all kinds of weird issues (car dies as you are driving) that they couldn't diagnose. I pretty quickly figured out it was the battery and they disagreed. This one boils down to improper training of the techs. Coming from the electrical background, I knew right away that a bad battery can cause these issues. Basically, the battery acts like a low pass filter for the noisy/dirty power that the alternate puts out. If the battery is faulty and goes open circuit, you have dirty power going to the sensitive electronics (ECU/PCM, etc). These devices are designed to shutdown when this happens, to protect themselves essentially. Coworker replaced the battery himself after I told him several times to. Problem solved. Dealer refunded him the cost of the battery.
2007 MDX Tech (purchased used):
1. Bluetooth module went bad draining the battery. Acura techs couldn't diagnose the issue and kept blaming the aftermarket remote starter. I went in and disconnected the bluetooth module and the battery stopped draining.
2. 120k kms, the Catalytic Converter went bad.
3. Timing Belt tensioner went bad at 110k kms.
While these are only 2 cases, I cruising the MDX forums shows how common the following problems are:
1. Wheel Bearings
2. Bluetooth Module
3. Timing Belt Tensioner
4. Catalytic Converter
5. Steering system gearbox
6. Rear Main seal