I absolutely suck with actual razors and they always make me break out. So I've been using a one blade for the long stuff, followed by a "wahl five star shaver shaper" and the combo gets me nearly razor smooth. Which is good enough for me. Combine that with the IPL and it's very effective. I do however have the benefit that I simply do not grow much body hair.
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I don't know if it's off label(I think my IPL says don't use it down there), but I've had great success with an IPL in those areas. I also suck at a using razors, and they always make me break out horribly. So I've been using a one blade and wahl shaver shaper to keep things under control. The combo of shaving and IPL has been extremely effective.