Hi Blue Eyes
Hair Club pioneered a business model whereby a system is basically crazyglued onto your head for a month at a time. Actually they cut a "track" around the edge of your good hair, and stick the system to the track. You can't take it off or do maintenance, and you are committed to return to the salon every month for "servicing". You pay a monthly membership fee (charged automatically to your credit card), rather than paying for what they do. There a different grades of "membership", equating to different qualities of system, and different numbers of system per year.
I believe this is still basically how they operate.
This system has a number of advantages. For the wearer, he (in theory) gets to forget that he is suffering hairloss. He never has to do any maintenance or see himself without hair. For the salon, it is a captive customer who is totally dependent, and therefore a reliable monthly source of income pretty much for life.
However, this business model works better for the salon than the customer. It is not hygienic to keep a system on for a month at a time. Imagine all the sweat, dead skin, oil and general muck that would be under the base after a month, and the effect that has on the health of your scalp. On some people it even starts to smell, and you are encouraged to squeeze scented disinfectant under the base. Also, in order to stay in place for a month without maintenance, the systems themselves have to be pretty robust. That is exactly the opposite of what you need to get the best looking must undetectable result - the best systems are fine and delicate. And there are other problems too. By the end of the month the hair on the glue track has grown out, and that means the system gets unstable and can start shifting around.
So basically it is a bad place to start if you are considering a system and you want a good result. I think a lot of men who could have found a hair system to be a good solution to their hair loss have been put off because their first encounter with hair replacement was Hair Club. If you go onto other hairloss forums, you will see that the negativity around hair systems is pretty much all focused on Hair Club-type problems - it's unhygienic, it stinks, the hairpiece gets loose by the end of the month, you are a slave to the salon, you get a hard sell etc. etc.
Hair systems are prosthetics. You don't have to tell other people you use one, but you have to own that fact yourself, and take responsibility for looking after it and keeping it healthy and goodlooking. It's the only sane and healthy approach. That's my take, anyway.