I'm using Aerofly with reasonable success in sequence practice. The secret is to choose a scenery that has stuff in the background such as mountains. The new, downloadable, Grassau photofield is pretty good, but my favorite is the Farmland. There is also a modified version called Farmland-grid floating around the Inet, made by an AMA pattern guy, that has a "box" suspended in mid-air. This gives additional reference points when flying high.