I oly lifted in chucks and in a pair of cheap Feiyue shoes (available off Amazon) that are little more than slippers.
I had plenty of hip, ankle, and hamstring flexibility, so going ass to grass in the recoveries was no problem. However, I pull from a narrow stance, and oly shoes have really helped me sit back and keep my hips down, especially in the snatch pull. They also make it much easier to make corrections in the bottom of the full snatch. I had plenty of flexibility to make full snatches without shoes, but shoes afforded me more 'wiggle room' to save a crappy snatch or even make a crappy snatch into a good one.
I use the Adidas Adistar Weightlifting shoes, the expensive ones. They work really well - high quality. I know a bunch of lifters at the gym who have had adidas shoes for years, and they've lasted well enough that when the soles finally wore down over the course of several years, the rest of shoe was still in such good shape that they could just take it to a cobbler, have the sole rebuilt, and keep using it. Don't overtighten the elastic straps that go over the laces, though - they aren't designed to be cinched tight, and if you try this you will put pressure on an area of the strap not designed to bear it and rip one of the straps.