Block planes are small but extremely versatile tools that fit into your shop regardless of whether your a powertool user or a handtool user.
Block planes fall in the family of bench planes and can be used for just about every job from rough to finish.
There is some confusion about the standard and low-angle versions, most specifically whether you need both or if you can get away with one or the other.
For my own shop, I definitely prefer the low-angle version because of how well it works with end-grain. But the standard angle is just as easy to use and can handle the same exact tasks.