As far as metering goes, any intelligent person can learn to work within it's capabilities. But as far as aperture priority mode is concerned, there is no camera that can hang with the Pentax LX as it is the only camera ever (past or present by any brand or model) that will autoexpose a scene for as long as it takes (or batteries die) - all the while monitoring the scene in real time, and adjusting exposure accordingly.
Most all aperture priority capable cameras can autoexpose a typical daylight scene. This one using the LX with Lomography 100 film.
Most can even autoexpose a scene seconds long. This one on Fuji RVP50.
However, autoexposing scenes measuring minutes long and you eliminate practically all cameras. This one >10 minutes on Kodak Portra 800.
For autoexposures lasting more than 40 minutes, I am not aware of any other camera that can do this besides the LX. I don't believe you can even do this using an external meter. This one using Kodak Ektar 100.
For this scene - taken using Kodak Gold 100 with the LX in aperture priority mode, I pressed the shutter button about 9pm and sometime after 3am it finished.
One drawback to making these long autoexposures is that there are no external cues that let you know when the exposure is completed. You would have to peek at the viewfinder from time to time to see if it has opened yet which can be very annoying on very long exposures. Fortunately, the LX also provides help for this as the x-sync terminal closes when the shutter is open and opens when the exposure is completed. So I devised a simple LED/battery arrangement that lights up when the shutter is open and turns off when it is done.
Of course this point would all be moot if you can't critically focus in these extremely dark scenes. This is where the LX's biggest and brightest veiwfinder comes in real handy.
Would you agree that this metering feature makes the Pentax LX a clear standout?