Thunder is great, but it's got some issues I hope they work out. I don't like that you can't block communities in thunder, or if you can its so convoluted that I haven't figured it out yet. I also don't like that it struggles to seamlessly refresh. You'll be scrolling through the feed then two seconds later go through the exact same ten posts you just saw because it refresh glitched.
On the other hand I think their feed aesthetic is the nicest of the bunch, and they have my absolute favorite feature where you can tap to unblur NSFW and then re-tap to reblur it all without leaving the feed. That is SUCH a nice feature.
I'm using connect as my main ATM but I'll def jump back to thunder if they can clean up some of the bugs!