I like Sia the most. I haven't actually used MaidSafe or Storj though.

I like Sia b/c they actually have a minimum viable product, which is a rare find in cryptoland.

MaidSafe I admit I haven't looked much into, but I am deterred b/c they've been at it for like 15 years, and no real results.

Storj I dislike b/c of the trusted bridge.

Used SiaCoin to store pictures of my puppies.

I'm a fan. I think this is a long term play. Too much supply, I don't expect a DASH like rise. Actually has a minimum viable product that addresses a strong market need and unit economics make sense. My biggest beef is lack of open source contribution.