Having never played MGS3 for more than 5 minutes, but loving MGS 1 and 2, I picked this up off ebay for £24 even though the demo didn't impress me due to the controls and I turned off after a few minutes.
Put 4 hours in to it so far last night and this morning, and it's awesome. Looks and soudns great, camera controls took a short period of getting used to, but throughly enjoying it so far, the plot is awesome.