Portal 2 handles workshop downloads poorly. I actually know of games that do it better, like "Contraption Maker", and that game doesn't do all of the below.

Poor handling:
-Downloads everything at once regardless if you want to play it or not.
-Checks subscriptions and play history for updates (really problematic if you have thousands of entries you have played).
-If checking all entries, can't start a coop community maps playsession until complete. Gets gradually worse with each new map you play.
-Can't clear play history.
-Purging the cache makes all the above problems worse.

LOL I subscribed all before looking at how many there were and it was crashing Portal 2 by the time they all loaded.

Thanks for the fave, And I'm fashionably late on saying this ;)

5 older maps have been added. It took me a long time to consider adding to the collection. Why? 90% laziness and 10% unsure about the toncica. Author is fantastic, but varies in difficulty quite a bit. Later stuff is very hard but earlier stuff isn't as intense. I swear there was a hard version of One of these Days seeing how there were three versions of Magnitude .

Cool thanks

A few more maps have been added for anyone interested.

Keep in mind, the list is incomplete and ever-growing. There could be author(s) I missed or never got around to playing their stuff. It's not growing now because I have become fatigued by putting in almost 3000 hours of Portal 2.

I don't have a clue. I just took the concept of favoriting and made things very easy to subscribe to.
http://www.steamcommunity.com/id/wildgoosespeeder/myworkshopfiles?appid=620&browsefilter=myfavorites

Damn I counted them (used pgdn and multiplication) and there is easily over 300 maps. It seemed unfathomable that I solved 300 tests in the last couple months but I guess I did. Thanks for taking the time to put it together. Really great list, I think I only thumbs downed like 3 of the maps. Any suggestion where to find other lists like yours?

A COLLECTION OF 358 ITEMS CREATED BY

That's what it says on top of the page where it displays authors. I don't think it counts linked collections as that is a separate number:

Linked collections (35)

Finished every single test. Are you sure you have "300 entries" it didn't feel like 300 tests. Or is that including the "linked collections" ? I need more Portal 2! :D

This collection is an incomplete listing of good maps. It does see an update from time to time. Check back to see if there are more maps to play.

Oh i have been busy for a while. Started at the top and worked my way down, figuring them all out on my own. I've gotten all the way down the list to the start of mevious maps. Having played some of his maps before I know I'm in for some challenges.

This should keep you busy for quite a while.

I want to thank you for this list. I was so sick of the crap that came out of the perpetual testing initiative. These have all been good maps. This is a great list.

300 entries have been reached for individual maps!