Hey, now! Be fair - MFJ sells some very nicely produced kits.
It's just unfortunate that they sell them as complete, ready-to-use products.

I have NEVER received an MFJ product that didn't have some sort of manufacturing defect that had to be resolved prior to use. From tuners with shorted leads to a dummy load with spare pieces - that didn't match anything from the construction of the dummy load - rattling around inside of them (how does a
rattling dummy load make it past quality control?!), every piece of gear I have ever purchased from MFJ has had some sort of issue. They usually work well enough after you fix them, but coming pre-broken from the factory should
not be among a company's major selling points.
The only MFJ gear that I have never had a problem with are a second-hand TNC-2, and an electronic keyer that I inherited from my grandfather. Both units have had work done inside of them prior to my receiving them, so I can only assume that they had manufacturing defects too.
Like many people, I bought MFJ gear early in my career because their stuff was affordable, only to find out that it was pretty cheap as well. (Not to mention potentially radio-destroying, as in the case of the shorted tuner.)
Best piece of advice that a new ham can receive: If you buy MFJ, make sure to have it opened up and checked out by someone who knows what they're doing, and what to look for
before you connect it to anything!