I put many "miles" on the Praktica LTL I mentioned earlier. It was perhaps "agricultural" in feel, a little noisy, not the brightest viewfinder, but it was rugged! I bounced it off a sidewalk once when I tripped. Other than a chunk off the baseplate no damage, and it worked fine for many years thereafter. It has what must be the best implementation of stop down metering I know of.
There is a stop down aperture/turn on spring loaded meter key just above the front panel angled shutter release. Press the meter key toward the body, set the lens or shutter, release the key and your index finger falls naturally on the shutter. Almost as good as full aperture metering, far better than the Spotmatic's switch.
Here's a picture which shows the meter key and the shutter release.
The film loading system is also excellent and virtually fool proof. My LTL's shutter sounds proper even after over 20 years of disuse; the original lens needs diaphragm cleaning, etc.