This device seems more stable than sub-20-dollar units. It does not suffer from lockup when changing frequencies. It appears to have excellent sensitivity, but its front-end can be overwhelmed in the presence of stronger, near-band signals, or when used with an upconverter (e.g. Ham-it-Up). I don't care for the location of the antenna connector, but the connection is solid, and suitable cables/adapters are widely available. (SDR manufacturers seem to be standardizing on SMA / RP-SMA connectors.) It is an exceptional device for the price, even given these caveats. And I've seen NooElec stand behind everything they sell, both technically and customer service-wise. I would easily buy this product again!

Using with a Raspberry Pi 2 running dump1090-mutability and piaware. Out of the box, kalibrate showed it at 0.185 PPM while I saw 7 and 22 ppm on R820T2 dongles without temperature compensation at ambient temperature. System is installed in attic and it sees large temperature swings. Without thoroughly collecting statistics before and after this unit, it's a little tough to tell the impact on performance but anecdotally I appear to have many more MLAT flights. As the warm weather moves in I expect to see much higher temperatures in the attic and hope that the reduced thermal frequency drift will result in better performance.

This is the gold standard for SDR radios. NooElec, in the Mini 2+ version, is manufactured with higher quality oscillator for stable tuning and lower noise. It's also one of the SDRs with the more performant R820T2 tuner instead of the older R820T. I bought two of them and they are identically perfect.

I've successfully decoded broadcast analog audio, audio walkie-talkie, and digital walkie-talkie radios using P25, as well as ADS-B aircraft pings. The receiver bandwidth is selectable to give you a larger waterfall but the higher bandwidth means less audio quality when you select a frequency to tune. If a USB 3.0 version of these SDR radios ever comes out I look forward to super wide waterfalls.

The one thing that might cause you problems is that, in spite of its traditional, larger USB dongle size, the antenna connector is the very tiny MCX female jack, so if you're upgrading from another device that uses SMA, be sure to find some converter cables. NooElec has a new model which is a miniaturized version of this hardware but is a little more expensive.

I'm a long time radio buff. I started "DXing" when I was a teenager. Then later in life I became a communicator in the military. I learn more about radio. The thought of being able to look at a large section of a particular radio band has always intrigued me. So when I heard about this gadget I was thrilled.

My only complaint of this item is that it uses the MCX connector. Spend a little more money and get the SMA connector.

This is awesome!!! Great price for a great product. You have to be a little tech (and radio frequency) savy, but if you purchase this, you will need software to go along with it.
rtl-sdr.com is a great website to find projects that you can work on including links to free software.*
I have no issues with over-heating, and am able to receive the full advertised spectrum.

*As with anything you download from the internet, make sure it is a reputable source and scan it for viruses, etc.