Pretty happy with the hardware itself. The build quality (besides the Dock) is much higher than the 3DS line. The 720p screen looks great - although I personally wish they went with glass over plastic (I know why they didn't, glass doesn't scratch but it will shatter). I've had no scratching issues putting it in/out of the dock, but I'd still get a tempered glass screen protector just out of principle. Haven't had any issues with the Left Joycon either.
Like any new electronic device, it's probably best to wait for the 2nd manufacturing run that will tweak the docks and eliminate the left joycon issue. I don't see a new version (Switch Lite, etc) coming out any time soon, unless they decide to announce a smaller form factor to replace the 3DS at E3.