Pros
The benefits are amazing and you get the sense that the jobs are stable. Unless a lab loses funding and your position/salary is contingent upon a grant, you can be assured of a place at the institution. They like to hire from within so moving to a new department is relatively easy, and while management isn't great the camaraderie that you come to feel towards patients, families, and co-workers is second to none.
Cons
I worked in a group where blatant sexism, cruelty, and favoritism were often overlooked. I put up with regular disgusting comments and, when I dared to reject/rebuff them, genuinely uncalled-for and awful remarks about my job performance from the scientific manager in the group I worked in. I was blamed for things that weren't my fault and systematically "othered" and pushed out after enduring months of abuse which, when elevated to more senior managers, was not dealt with appropriately. He suffered no repercussions and I was made to feel as though I had to leave. I was asked to work overtime without pay more than once, but I refused to clock out. I was expected to always be available to answer emails and calls, to scrub in for 5 am surgeries and collect specimens, to stay late processing and enrolling and doing paperwork -- but then got in trouble for going over on my standard hours and forcing the department to pay me overtime. Overall I consistently had far more put on my plate than any one employee should be expected to handle. It was a toxic and unsupportive environment. Great place if you need a stable job with good benefits that pays the bills, not great if you care about career advancement and your own mental health. Especially not great if you're a junior female employee.