Yes, I do both as a consumer and as a physician/medical director who engages with health shares as part of our company's product offerings. I trust you do not need a definition, but in brief they are a sharing pool where a number of people pool their money to help pay for medical expenditures. As opposed to insurance, there is no mandate for payments to be made, but issues will quickly surface and reputations suffer if they are not. They tend to be much simpler to use than insurance, which has many layers of cost offsets to you such as copays, coinsurance, deductibles with max out of pockets to track.
Healthsharing pools started as faith based, but that has changed with newer ones not having faith requirements. Zion is in the latter camp, fairly new, with around 40,000 members. I used to belong to a faith based older one but more and more complaints surfaced on payouts, with members getting sent to collections by hospitals. I thus switched to Zion. Zion had very good feedback with various online sources with prompt payouts, so I switched and has worked well, though I have not had to file a share. Our health care company now supplies Zion for its employees.
A lesson in medical economics - I am 59 years old, and pay Zion $250/month for their $3000 max out of pocket annually option. I get a discount of $70 because I use a Direct Primary Care doctor locally whom I pay $70/month. Thus, I pay $320/month total. And do note Zion uses roughly half of the income for sharing, banking the rest for a bad claims year. If I had 3 or more bad things happen (eg heart attack, fracture requiring surgery, appendicitis) max I would pay that year would be $3000 in payments, $3000 max deductible/out of pocket = $6000 total.
With an ACA plan, silver, I was looking at $750/month, with $7000 max out of pocket. So, with the above "bad year" scenario, I would be out $16,000. So, where does the $10,000 difference go? Yup, insurance company profits.
Anyway, there are many tradeoffs between a health share and traditional insurance. And some states prohibit health share use with some health sharing companies (eg Washington state and Sedera). I don't think Zion has any state restrictions, but you can ask them. For our company, they were the top choice, and for me personally.
There is much more I can add from experience, but this already is long. PM me if you wish. Best regards with your choice.
Carl