These 2.5 gallon ball lock kegs have reinvigorated my homebrewing hobby. I now have 6 of them in rotation and bottling is no longer a giant, messy pain.
The upsides to kegging, for me, are myriad. No more clumsy bottle filler. No more sanitizing cases of empty glass bottles. No more stinky, sticky bug filled bottle collection waiting to be cleaned. At its simplest, you siphon your beer from your fermenter into the keg and seal it up.
The only nuance is carbonation. You can bottle/cask condition in the keg, but you need less sugar (about 1/2-1/3 of what you'd normally use.) If you'd rather, it is also very easy to force carbonate your beer with CO2 and skip the entire bottling sugar step.
Refrigerate a keg for 24-36 hrs before serving. It takes a while to cool them down!
Kegging was a major step in simplifying my homebrew process. Without the mess of bottling this hobby became fun again.