Artwork download for Mac

What do you guys use?

I'm having trouble with getting iTunes to download any artwork for more unknown songs and remixes. Any good suggestions?

I use trainspotter for all my tags. Great if you are a traktor user and pulls tags and art from beatport- just a bit of a learning curve on the software.

Trainspoter or Google + Kid3, depending on what I'm tagging (non edm and unreleased stuff).