Well, I still use ILSpy. It used to take like 20 minutes to decompile and would be fine. Now as of 1.3 my computer lags out when I use it and it takes forever. I have more than one computer, so I let the faster one (2.5ghz Quad Core i5, 8GB Ram) decompile it, while I use my other one. On that hardware it takes about 7 hours.