I posted about it above, but I tried to read Gravity's Rainbow right after Infinite Jest. While the latter was a bit confusing to follow early on, once you make sense of characters, it's pretty easy to keep going. The writing was fairly straightforward (even including the million side notes). I cannot say the same for GR. I gave up a third to a quarter in, having realized that I have no idea what's going on and that I can only follow the story line based on the Wikipedia summary. It definitely felt like a different level of convoluted compared to IJ.