I got Microshift not long ago and it works great to add a touch of stereo depth to vocals. I've used Channel Tools included with Cakewalk for many years, does a similar stereo spread effect but I feel I get more control with channel tools. Channel Tools lets me swap and determine width of the signal in each side. I used to do this by hand, doubling and offsetting tracks. Much better with this plugin. And it works great in doubled instruments like guitar, I can fatten left and right up, the result being a very wide and full sounding rhythm track. Because it's NOT a chorus effect it doesn't color the tone/attitude of the instrument.
I find Microshift can sound a bit chorusy if you lean into it too aggressively.
Waves also has a stereo imaging plugin that works similar to channel tools, but I found it clunky and since I already had a good working knowledge of channel tools haven't used it much. I do sometimes use the Waves Center plugin, especially when I don't have access to the mix. It's good for controlling vocal presence, but can also be used to increase the stereo image.