I've had my Samsung Galaxy for about a year. 2 weekends ago the power button stopped working and the phone reboots itself several times during the day. And there's no way to turn the device on except to plug it in. I spent a whole weekend reinstalling software, resetting it, etc. Anyways, ended up with an app that turns on/off using the sensor button. Occasionally the phone will still reboot itself.
When the problem happened, I searched online and found that this is a common problem. So while the android might not be an issue, the actual phone can be lower quality.
My husband had a motorola photon, had issues and switched last year to iphone.
I am still debating whether or not to switch to iphone for the better quality product and better pictures. However, I'm not a fan of apple and prefer android os.
Regardless of what you get, buy a quality protector case and consider buying the insurance!