I recommend version 2 (there is a link in description). It DOES require having a mega.co.nz account, importing version 2 (or 1 or both) to your cloud drive. Then downloading the mega.co.nz megasync app, so it automatically downloads onto your PC. Otherwise, if you download straight from the link provided its likely you won't be able to download the whole file due to limited bandwidth mega provides. Unless you already pay for mega.co.nz and can download bigger files.
As for the mod. Despite it being "Anime", its actually focused on 1. gameplay/content, 2. challenge and then 3. graphics
Its also incredibly intensive. Need a 4gb minimum GPU and a modern CPU. Its VERY stable (version 1 not so much to be honest, its the "original" anime mod). However, is quite the system hog. My CPU is too outdated to get good performance out of the mod, even though my GPU is good.
Also, version 2, the install and to get the game running is 99% automated. Just copy the skyrim directory to the main steam folder, run mod organizer.exe, and in profile set it to "Anime" and the load order will automatically go to where its supposed to be. Then run skse through mod organizer (do NOT run SKSE directly from the skyrim folder)
Version 2 provides many new lands, tons of new quests, tons of new items, better looking characters and just overall a lot of new things. It also updates a lot of the outdated mods from version 1, and adds some new modern mods. Version 2 replaces unofficial patches, for SLEEP, so its kinda focused around that a big. It also has camping mods and other things
You can see screenshots/video and a better description on the moddb page.
Also, obviously doesn't work on skyrim special edition that came out. But it looks better!
My Skyrim, Fallout 4, Starbound and WoW + other game mods at MODDB: