They are fantastic. I have several more of the longer fluorescent replacements in my wood shop. More light is magnificently better for energy and productivity in pretty much all environments.
I would still prefer skylights to bulbs, but these are a good solution for dark rooms.
There are a lot of Chinese cheap LED fixtures available on Amazon and no one seems to care about the CRI - it defines how colors appear in your room.
That, of course, is apart from the actual being unable to see certain shades of color and the spectrum being skewed one way or the other.
There are better measures, but almost no manufacturers use them. I think just having the output spectrum and eyeballing it will do the trick.
The best lights I have are some warm white LED strips from eBay. I glued them to the top of my workbench (it's a desk under some shelves basically) and it is a joy to work there. I measured them and they are pretty close to daylight in terms of CRI, something like 93 if I recall correctly.
The only thing that makes me unhappy is the current state of LED strip driving. I have a device that takes 120VAC and turns it into 12V for the light strips. It "interprets" the output of a triac dimmer in front of it to PWM the LEDs. Very wasteful and stupid, but there are no constant-current drivers that just let you use something to adjust the current output unless you build your own. (A friend of mine did just that; the lights are amazing.) PWM naturally causes the cheap capacitors in the DC/DC converter to make noise, so I pretty much never dim them.
You could tell it was wrong just by looking. It wasn't a measurement that only appeared by looking at it with expensive equipment; you turned the lights on and instantly though "this is completely unusable". I only measured it to see how bad it was.