Poor choice. Would not recommend. Almost all the references are going over my head, and I really don't feel like chasing them down. Maybe I'll pick it back up after studying the 1905 revolution or if I really get into German social democrat history or whatever. I'll finish it I guess, but I expect to retain nothing and learn very little.
Check out Rosa Luxemburg's Imperialism too, it offers a very different, but still compelling, critique from Lenin's (who was also cribbing Hilferding). It's like the most interesting thing she wrote that's not read often.