Yep to the title. That is pretty much how I felt about it.

This texture pack refreshes you with new in game content. It take away the more simplistic square look of most blocks and resamples them by giving them a bit more of a complex shape.
These blocks include:
-Doors & trapdoors
-Held items
-Redstone blocks
-Rails
-Eggs
-Walls & Fences
-Furnaces & Crafting tables
And honestly so much more!

However the best bit is that it keeps the classic look of Minecraft by not altering the colors and it performs downright amazing.
I had it play on my own Gaming rig (i7 6700k - 980ti) with no fps drops at all and thus was able to nicely combine it with and ultra shaders. However, I had it tested on other systems as well, I had my friends try it out with their laptops and the same story was applicable. No fps drops while increasing the in game experience and feeling by a mile.This is why, in my opinion the "Default 3D Models" Texture Pack by Sibsib92 is one of the best add-on you can have in your game.
Go get it here and test it out for yourself! (This does work on even 1.9.4)
Cheers!