Good replacement plug -- but....
579667
Plug is solid and easy to install & use.  I'll keep it.  But be aware that if you're replacing a plug on the cable that extends from your RV, this plug will not fit into a standard 3" electric cable hatch/door.  You'll have to install a much larger hatch in order to recess this plug into your RV.  The plug is about 5" across.  Best price I can find on a replacement hatch big enough to accommodate this plug is around $30.
3356458
Update - Belkin contacted me and made right by replacing this surge plug... the new one works perfectly and I'm happy to tell you that Belkin continues to be a top brand with quality products.

Original review
I had an older version of this power strip and loved it... but it only put out 1 amp of power, making charging a phone on Amtrak kind of slow. I ordered this one as can charge my phone more quickly. That said, the quality control isn't up to Belkin's normal standards. One key feature of this is that the plug is supposed to turn, adapting to different electrical socket orientations. Mine is defective - it only turns about one-eighth of a turn. I've contacted Belkin and they are out of stock. Not sure if I will ever get this replaced, but they promised to call me back.
2804777
The plug broke, but the manufacturer sent me a new one. The new one works fine, but we'll see how long this one lasts.
3602264
Amazon is the cheapest price I could find for this plug. It is an exact fit.  If you are careful you can actually disassemble the plug and just insert the old wires into the new plug. (As long as your wires are not burned; the plastic clip on my old plug broke)
166481
This plug is somewhat difficult to find and the price varies all over the place.  This was the correct plug and the price was not unreasonable.
3858371
Plugs work great.

That said, before installing make sure you check the gap between the electrode and pin at the tip of the plug (these should be at 0.044in).  Also note that these are not the original plug model that come with vehicle (DILZKR7A11GS).  Unhappy with actual packaging of these as all were floating loose inside the box when arrived.
4057774
Good fit, just had to replace the plug with a smaller one to be able to put cover back on. But non the less, works great.
2785440
The catch:  It fit my old 5/8 inch spark plugs I was removing.  Naturally I thought it had to be the new spark plugs that were messed up.

But then I tried every other 5/8 inch socket I have in my garage and they all fit both the old spark plugs and the new spark plugs.  So I had to make a trip to home depot to buy a new extender so I could use one of my other sockets.  This ended up only being useful for removing the old ones.

Perhaps poor QC?  \_()_/
3051455
Yeah, the plug fits. But I get no charge from it (multiple adapters, and they work with my "brand name" plug). It does show up as a device in Windows explorer, but I really need a charging cable. I'll be looking for some satisfaction on this.

Addition, 3/7 -- The cables are working for what I need them to (charging), and I am OK with them. Quite happy with the Seller; prompt and courteous service. I am upgrading my rating from 1 star to 4 stars. Should have worked easier, but the seller was helpful.
1479363
Used these to replaced the plugs in my 2012 Kia Soul +. Good news is they work. Bad news is that the factory installed plugs used the standard 5/8" thread which I had in my tool box. When I went to install the new plugs the 5/8" socket wouldn't fit the new plugs. Fortunately I had a 14mm deep socket, but I had to drop the plugs into the head (never recommended) and hope for the best since the socket didn't have a spark plug boot. Fortunately it all worked out well, but I was cursing these for a few minutes. Now I just have to remember the thread size in 75k miles when I go to replace them... and a magnet. If you have a 14mm spark plug boot buy away, if not I would factor that into the price and buy one.
4032720
This is a decent replacement adapter but it doesn't fit some electric products with it's small plug.
4324402
Good replacement plug when you lose the original plug. Does what if is supposed to do. No complaints about the price or the operations.
3918610
It works as required.  Make sure you order the right amperage though. This plug will not fit in a 15 amp outlet.  I needed the 15 amp plug.  I ended up changing my outside outlets rather than having to wait over another month for the correct unit.
1402435
The vacuum side plug no longer contacts the vacuum plug prongs. If you bend the vacuum plug prongs out and carefully reinsert, it will work until the cord gets moved. I took it apart to examine the plug but the interior prongs are not accessible nor is the actual plug anything standard or easily replaced. I would estimate the plug failed within 50 insertions or less. I'm outside my return window.
It worked fine other than that, but  based on simple plug durability I wouldn't purchase again.
4957854
It's a drain plug.  It does it's job.  If I lose this one I'll replace it with another.
3826848
I ordered this as a replacement for original factory light on my 1994 Chevrolet C1500 pickup.  Easy to install, no problems there.  But found there was problem with operation.  Googled the manufacturer (Bully) and called their toll-free customer assistance number.  They provided a quick and simple solution:  switch the brown and black wires in the plug.  After doing that, light works fine.  So, it was not "plug-and-go" as advertised, but the fix was a simple one.  Also, the "gasket" supplied is not very substantial, merely foam rubber that does not cover like factory original.  I ended up using the factory original gasket with the new light, in addition to the new one that came with it.  Hopefully, between the two of them they will keep water out.
114042
Determined during install that the circumference of the replacement was slightly larger than the OEM 120V charger. Ended up using sand paper and carefully sanded the opening until it fit. Otherwise, it is working just fine.