The video below does a great job of explaining what Disgaea is in general, specifically Disgaea 5, and how nearly anyone who likes SRPGs is likely to enjoy it. If you're unsure about the game, but like the genre, check out the video.
There's also a demo of Disgaea 5 Complete on the eShop so you can try it before you buy. Click here to use the Nintendo UK site to send the demo to your Switch while it's in sleep mode.
How well did the Switch version review?
Metacritic - 87 with 13 reviews
USgamer - 4.5/5
God is a Geek - 9/10
Real Otaku Gamer - No Score
Destructoid - You pick the score with a quiz
Confreaks & Geeks - 4.06/5
DualShockers - 9/10
HardcoreGamer - 9/10
Nintendo World Report - 8/10
Areajugones - 95/100
Twinfinite - 3.5/5
Switchitalia.it - 8/10 (English summary)
Digitally Downloaded - 5/5
Multiplayer Italy - 8.5/10
Eurogamer Italy - 8/10
Cubed3 - 9/10
App Trigger - 9/10
Ok, dood, you got me. Where can I buy it?
At the time of writing:
£38.95 at The Game Collection
£39.85 at Simply Games
£39.99 at Amazon (£37.99 with Prime)
£49.99 for the download version from the Nintendo eShop
£74.99 for the Limited Edition from the Nintendo UK Store