So, yeah, I'm kind of late to DFW with my only previous experience being his great book of essays - A Supposedly Fun Thing I'll Never Do Again: Essays and Arguments. It's not difficult to see how brilliant of a mind Wallace possessed, but the idea of reading a 1000+ page book was somewhat intimidating to me. Fortunately I found it to be quite rewarding. 
 When talking about Infinite Jest you could literally hit on about a bazillion different things, such as it's mammoth size, or bizarre structure, or how it is a pretty strange book in general. For me though, I found it to be a very sad book and a brilliant one at that. It has a lot to say about living in the modern days of America and has plenty to say especially regarding addiction, entertainment, happiness/depression, and escapism. 
 What makes Infinite Jest great is probably how original and authentic DFW is as a writer. There really is nothing much like reading IJ. I'll have to re-read it sometime in the future.