I purchased my first OSRS plugin from xKylee back in September 2021. Now I have 28 of them plus another 30 or so from the other devs of the Hydra team. Plugins function as expected, customer support is good, and ongoing updates are provided. In particular, I feel that xKylee's plugins are extremely safe (relatively speaking for a plugin) which is a huge bonus. As long as you aren't doing anything incredibly blatant and/or stupid, the risk of a ban is very low. I would definitely recommend investing in any plugin for activities you do a lot. There's a lot available for both PvM and PvP.
Special shoutout to the Auto Cerberus, Hydra, Pot, Coin Pouch, Gear Swap, and Continue plugins -- each one of them has paid for themselves many times over.