Anyone out there get there ATP while non-current?

I haven’t flown in about 18 months and trying to decide if I should try and knock it out while non-current as I have some leave to burn before I get out. I heard people don’t always pass but not sure how challenging it is or what are the odds of failing are.

Also anyone get their ATP through ATP Flight Training (https://atpflightschool.com)? If so do you recommend them.

Thanks!