Tax Lien Investing - Pros and Cons

Snapshot: I have one rental that was my primary residence, so there wasn’t a lot of research involved beyond me not wanting to sell a California home because they generally go up and up. But now I’m like a medical researcher analyzing every variable.

Currently I’m learning about tax lien investing. There is a potentially lower amount of capital needed which is enticing, but there is also potential to get stuck with a property with many hidden costs. Has anyone had consistent experience with this method?