They work normally with all games, just like G25 pedals. However, like Babkicks said, GT5 has bad clutch implementation. Hopefully they will improve it since they are planning to release an official wheel that with a clutch, so I don't think they can afford the clutch not to work well any longer.
CSPs are in my opinion one of the best sim racing investments you can make. Besides being all-metal they work and feel really great.