Who is your favourite quant publisher and why?

Hey everyone, I’ve been a big fan of Unsloth for several reasons: They publish models ASAP after release. They usually offer the lowest PPL. Their website has tons of helpful tutorials and documentation. Recently, I stumbled upon this Reddit thread suggesting to try out an Apex MoE quant of Mudler instead: 👉 So I decided to test it myself. I tried running Qwen3.5 122B IQuality, which is roughly the same size as Qwen3.5 122B Q4_K_XL.