On my third 360, and it's worked fine for about 2 and a half years now. I'm planning on getting the slim at some point though, whenever I can be bothered to.
My current 360 has also spent the last 4 months attached to my PS3 slim with liberally applied Velcro. Together they make quite the abomination. They even share the same HDMI cable.
My current 360 has also spent the last 4 months attached to my PS3 slim with liberally applied Velcro. Together they make quite the abomination. They even share the same HDMI cable.