I've had this for a few months now and seems to be holding up pretty awesome. I have hauled my ktm 250 and yamaha 450 on it with no troubles on about a 45 mile drive to the place we ride, but mostly use it for my 450 and my sons 80. Works perfect and super easy to rig up a few bikes with 1 person. I reccomend

This motorcycle rack does not hold 600 lbs. There is a label that says 400 lb capacity next to the Black Widow label.
This is the second one I have ordered after contacting Amazon, they said they would call Black Widow and hold one for me that has a 600 lb capacity and to reorder the rack. I reordered and opened it today, it is the same motorcycle rack that only holds 400 lbs.
The description says 600 lbs, I chatted with Amazon to no avail about their description and the one I received. No help at all.
I am returning this one again.

We have two RadWagon electric cargo bikes. They weigh in at nearly 90 pounds each and are simply too heavy for conventional bike racks.

We tried a heavy duty Yakima rack that required lifting the bikes and positioning the supports through the frame. It was a nightmare, and required two people. Further, after a trip to the Canadian Rockies, we noticed that the rack was sagging considerably. I had to find a better solution.

Enter the AMC-600. I realized that I needed a combination of lightweight and strong, so aluminum was the way to go.

Assembly took just under an hour. I found an assembly video on YouTube that was very helpful save for one issue with where they suggested mounting the ramp. After putting it together and using it, I determined this had to be wrong. The ramp was mounted too close to the tie down holes, so when using ratchet straps, I was unable to use the ramp. I'm going to reposition it to the back.

This thing is still rather heavy, but you should be able to mount it to your hitch solo. It's just a bit awkward to do so.

We've done 400 miles so far in our RV with the AMC-600 attached. It's an incredibly sturdy rack, has no apparent sway, and nearly zero deflection when loaded up. Admittedly, that's with 200lbs of bikes plus the weight of the rack, well below the rated weight of 500lbs. That kind of load might make me nervous.

If there's one downside, it's that this thing hangs quite far behind the motorhome. If you're using this, just remember that your vehicle is now considerably longer than without. This also impacts departure angle, another consideration. I purchased a hitch riser that lifted the setup 12 inches, but that added yet another foot of length. Despite the riser's claim of being able to support 500lbs as well, it just seemed like there was too much leverage now being applied to my hitch.

Pros:
Sturdy, lightweight, able to support two electric bikes (fat tire bikes will work as well), good attachment points, ramp

Cons:
Length impacts departure angle.

If you're an ebike user, this is a great way to go. I recommend the AMC-600.

Pros:
Shipping was fast, and product arrived undamaged.
The Hitch Carrier seems very sturdy and appears to be constructed well( except for the ramp). It supported my 2 bikes just fine.

Cons:
Ramp bent a bit on first use, it is very thin. This is the one part of the carrier that I do not recommend.

My setup:
SUV with load leveling rear shocks.
Used for: 2 smaller dirtbikes 100 and 125cc.

And yes it does ride a bit low when loaded with my bikes, but I was prepared for this after reading other reviews.

Well built, Holds my 2 Motor scooters. I use this with my front receiver CURT 31070 Front Mount Hitch so I can take my 2 scooters with me while pulling a camper behind me.