Not the OP, but, I've had a few of these over the years and they are great. These and their sibling monitor the 14-inch Macintosh Color Display have bright clear 14-inch trinitron displays that display at 640x480, which means that they're the resolution most '90s Mac games expect, and system 7 generally works fine.
I would say, if you are primarily gaming or enjoying Multimedia(TM) on a 68k or beige PPC Mac, then these monitors will work great. If you are using a newer PowerPC system (incl. mid-beige era, anything with PCI slots) and you are doing content creation in any way, or are interested in a lot of workspace for whatever, this isn't the right monitor for you.
The 950 in particular, if you're using it for "workstation" stuff might benefit from something bigger, but the AV14 will work great, sound great, and look great on a 950 or IIci.
Whether or not it's the best really depends on a lot of things. For one thing, they have what I'm pretty sure is the single thickest cable Apple shipped on literally any product. They have an S-Video input port that, I'm pretty sure does literally nothing, even on an AV-equipped X100 PowerMac, they are limited in screen resolution, they're heavier than the stand-alone monitors, they're annoying/difficult to transport, (although the plastics on mine are in "fine" shape, I still wouldn't want to ship it), and relating to that giant cable, they need a dongle to work anywhere except for the X100 PowerMacs, and, you need two dongles if you have the misfortune of wanting to run one on a 6100/DOS. (The solution there is either to run a second monitor for the DOS card or to not have a 6100/DOS, but, I do have a 6100/DOS so I'm gonna put my AV14 on the 6200 and my MCD14 on the 6100.)
They're also, as a display, not any better than that sibling display, except that they've got speakers and an ADB hub.