Well darn, I hope then that Viz release a 2 for 1 in the same oversized format as the 3 in 1's. The extra large art and color pages are amazing
Why hate them?
For one they can be a LOT cheaper. $15 for what would otherwise be $30 if you bought the individual volumes. Plus it helps when you can't find all the volumes in print. I had given up on getting the Evangelion manga simply because a few of the middle volumes where out of print so if it wasn't for the 3 in 1 edition I wouldn't be able to add that series to my collection.
I'm not sure how good the quality is for other omnibuses but the Eva ones are top notch.