It's worth noting that there is a pretty serious technical issue with the universal controller.
The Universal Controller uses Bluetooth when connected to my Samsung Galaxy Tab 10.1, Bluetooth hops around the 2.4GHz range. My Wi-Fi (until recently) also used 2.4 GHz via 802.11n. This caused my tablet to drop its wireless connection after playing via OnLive for a few minutes.
OnLive support were helpful but couldn't identify the issue. After a bit of searching I found that other users are having the same issue. The only recommendation was to switch to 5GHz for my Wi-Fi.
A new router (£80) and now I'm working perfectly, luckily I needed a new one as mine was pretty dated, but for people not in a position to upgrade it shows a major failing in the testing of the hardware.