I have that exact same rack!! From cycling deal. I've had mine for about 8 years now! My take on it is:
(bear in mind that I store mine outdoors in a dry-ish spot)
Pros:
It's very cheap, you can't do better at this price.
It folds up extremely small, very easy to fit in your boot
Fairly easy to fit any size bikes on it.
It's 8 years old and hasn't broken yet. Not really any plastic to snap.
It's reasonably light.
Cons:
It rattles in the tow hitch! No anti-rattle mechanism to speak of besides tightening the bolt holding it on, which I can't easily do because there isn't clearance for a spanner with my tow hitch (but this isn't really an anti-rattle mechanism if all the slack is taken up by bolt threads)
The wheel hoops are movable by un-doing a hand-twist bolt. Therse are extremely hard to turn (and, being modest, I have rock climbers hands).
The 'buttons' you press to release the centre ratchets are extremely hard to press when they are under load and holding the bikes down, and you will catch bits of finger skin in them if you're not careful.
Due to the last 2 reasons, neither my kids (aged 10 & 12) nor my wife are able to load or unload the bikes onto the rack.
On long trips (say 5 hours Melb to Falls creek) the hooks rub on the top tube. I use rags to protect the bikes but imho it's just not a very good method of securing bikes. I've never shuttled up/down dirt roads for a prolonged period, god knows what that would do to your bike.
If the paint chips, it rusts.
But, having said all that, given the price I paid, and it's had a LOT of use, I've been really happy with it.
Another plug for the cycling deal job (when its in stock...)
CB-640A
Only caveat is that as with all racks that have one vertical pole to clamp, its a bit of fiddle with two bike getting the hook in a good position on both top tubes. Its perfect for one bike though - its literally a 5 second loading procedure.
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