By itself, it's hard to really recommend the Switch version of Zumba Burn It Up! The tracking isn't great and it's not something you'd ever want to spend hours with. However, as a greater part of a workout regimen, it certainly has its place. If anyone is looking for something to pair Ring Fit Adventure or Fitness Boxing with, this is fairly decent addition.
Let's Sing Country is a totally fine karaoke game that has a pretty lacking tracklist. It has made the conversion to Switch just fine as it's easy to read the lyrics even in handheld mode and the mobile phone app means you don't need microphones to have fun. However, there's just not enough songs to make it worth buying for most would-be singers.
Ultimately, the Complete Edition is the best way to experience this spin-off, as it is a solid game in its own right and serves as an excellent, if different, primer for No More Heroes 3.