Been building modded controllers for competitive players, and the same questions come up every time someone's deciding what to upgrade. Quick breakdown of what's actually worth it:

Worth it:

1. Hair-trigger locks — shaves real reaction time on shooters. This is the single highest-impact mod, full stop.

2. Remappable back paddles — lets you jump/reload without taking thumb off the right stick. Huge for aim retention.

3. Adjustable stick tension — most players are running stock tension that doesn't match their grip style. A 10-minute tune-up changes everything.

Overrated for most players:

1. RGB / cosmetic mods — feels great, changes nothing about performance.

2. Ultra-high polling rate wireless dongles — only matters if your base latency is already dialed in. Most people have bigger bottlenecks (input lag on the TV/monitor) they haven't fixed yet.

If you're deciding what to upgrade first: fix triggers and paddles before anything else. Everything else is marginal.

Happy to answer questions on setups in the comments.