Controls work as stated and the an/out voltage display is a great convenience.
356596
Shipped in short order and regulates as specified. Controls work as stated and the an/out voltage display is a great convenience.
1182424
As far as I have been able to test it (I am a weekend hobbyist), it works fine.  The only catch is that you have to press the run/stop button to change the settings and then press this button again to get the output signal.  It did not come with instructions, but aside from the run/stop button, the display is very straightforward.  Being under $40, it is well worth the price.
1753388
Interestingly, this machine can be triggered by either 12V DC or 24V AC. Conveniently, 24V AC is what any sprinkler controller puts out, such as my Arduino-based OpenSprinkler.

I didn't feel like paying extra for their reasonably-sized hopper. Luckily I have use of a 3d printer so i printed a "customizable funnel" from thingaverse to fit a bottomless peanut butter pretzel bottle and the size of the hole saw I took to the cap of the Super Feeder.

Feed portion is regulated by turning an analog rheostat with a little flathead screw, thoughtfully illuminated by a blue led when powered on.

All and all I like this thing, it holds up to amazon hype. The documentation is awful in terms of information presentation but the instructions are eventually clear. This thing is well-designed, it apparently is shipped with a few different parts as a coy pond feeder, and can be easily mounted on a post.
2781514
Purchased this item in order to convert DC 12V to DC 5V.
Currently using this single step down converter to feed 5V to 4 different devices simultaneously.
Voltage indicator is dead accurate and potentiometer is easy to control. In rather demanding current draw, the output voltage never seems to drop below to the set voltage. Pretty impressive device.
326047
I've used this a few times and am happy with the performance.  No issues so far and convenient.
4100387
This temperature controller was used to control a fan that ventilated a closet with a boiler in it. Instead of using it in heat mode it was configured in cool mode. Setup was straight forward, just read the directions. The display is easy to read and the four buttons had a good tactile feel.
2398219
The variable power inverter works really well.
4723791
Works well; mounted on an electric minibike I built to monitor voltage - easy to read, installed easily.
217987
Great little display.  Spliced in to the wiring under the dash and now I have voltage display in my S2000
3021254
Being able to control turn-on and turn-off points is exactly what I needed.  This is a great switch.
719786
Works as described, easy tare, and easy to switch between units.
1100531
It works well. Charges aa and aaa batteries in reasonable time.
3112089
Works very well, large easy to read display.
1299757
This regulator has a great display, and works exactly as a regulator should. I am able to get pretty precise control, and there is no misreading the dial!
3161068
Certainly does the job as expected, and a good option for the price.  Smaller batteries (AA,AAA) must be held in place exactly in the middle of the top plate to get a reading, meaning that you're holding the battery off the inside of the tester rather than just being able to rest it against, which would make it a littler easier - not a deal breaker though.  I also wish the adjustable red slider used to set the size of your battery for testing was spring loaded.  Again, easier but not a deal breaker.
1761427
Easy to use, works well. Had issue connecting to voltage step-down convertor so I can adjust full range of required voltages.
4935329
This is a great device to monitor the charging system and now that I have it sure taken out a lot of guess works or taking the meter and make reading, especially the current reading isn't practical for meter and probes.  Plug it in and play around with the arrows and it will display PV voltage a great function which allow me to switch from DC charging when voltage below biased voltage for AC grid tie (for AC solar panel equipped with microinverter).  It will display battery's health = State Of Charge and temperature and many other useful displays and it is light up everytime the key is pressed so no need for a flashlight to read it in the dark.

It is pricey and I don't know how long will this device last but it will make your life better at this experiment stage.