In January, I went to get my ATP in an airplane I had hundreds of hours in (Aztec) after flying the ATR for 9 months. It amazed how I had forgotten to land the thing! I was glad I had a CFI on board for the first few messes I had to call landings. Flying a transport category airplane and a GA airplane are different. If you haven't been in a 172 for a while, I would recommend a CFI on board for a few minutes around the pattern... when I was a CFI, I always cringed a little bit when the "airline guys" came in for the checkout our insurance company required. Everything was always great, except the landings...