It was Nintendo's worst console. It was obsolete when I brought it home to my HDTV. I had to special order progressive-scan component cables from their online store for $20. Motion controls were really only worth a shit on Wii Tennis. Motion controls made combat in its two Zelda games a random wagglefest, and the stupid nunchuk attachment was a poor solution that made playing first-person games feel utterly weird. It never got third party support worth a shit, it stayed turned off for months and months gathering dust, there was no online account system so all digital purchases were device-specific, and there was no voice chat, matchmaking, achievements, or online community. It was severely underpowered compared to its contemporaries, the name was awful, the games only read from the disc and couldn't be installed or patched, and barring Super Mario Galaxy, the first party library featured very lackluster entries in all of Nintendo's core franchises, while very little in the way of interesting new IP came out in the life of the console.
Compared to the have-it-all days of the NES and SNES where Nintendo had competitive technology, great new IPs, great third-party support, and amazing entries in established franchises, I have no idea how anyone can say Wii is Nintendo's best console. Nintendo still continues to suffer from their idea of "affordable novelty" that turns a profit on hardware because of some gimmicky idea like a tablet controller, motion controls, and glasses-less 3D. Since getting stuck in the mindset that the Wii was built on, their share price has dropped from $80 to $20 and they find themselves a distant third in the current console gen.
So, no, it isn't the best console. And it might have set a great company -- one of my favorite companies -- on a path that will see it radically downsize and turn into a Sega-esque franchise publisher whose mascots coast on nostalgia, say yes to everything on every platform, and subsequently drive their own value into the ground.