It is so boring walking at normal speed to a place 50+ blocks away (even worse when travelling). So this sprint mod adds a very useful feature, and it's integration with HUD Bars makes it sit nicely. I like how the stamina regenerates, and how sprinting affects satiation (hunger).
I don't see any reason to not use this mod, unless you're using a different sprint mod - but this one is my favourite, and (for me) the only one that works reliably.
Extra Biomes adds so much variety to the game, and sometimes I can't even tell that it isn't a default biome because the textures fit into MTG very well. And all the biomes are useful - what I mean is they aren't a waste of space, always having some extra fruits or wood in them.
It is definitely in my 'Recommended Mods' list, the one I give to my friends when they start playing Minetest.
The one thing I'd like is if doors for each new wood type would be added, it looks weird with a nice wood coloured house and then having to use the default door.
This mod is great if you like to play with multiple people, being able to put emojis above your head adds a lot of laughter and is a nice addition to the game. The little 'ping' noise played is good as it can notify people that you have sent an emoji.
Being able to do /e and then click on one is so fast which makes it very convenient and easy to use. Chat smiles are a lot slower but good to have. It is a nice collection of 20 emojis, that can fit almost any situation.
Once you put up an emoji, it will fly upward a bit before disappearing, but won't follow above the player who sent it. This can be annoying, but doesn't matter that much.
Overall, a nice mod to have in your multiplayer world.