Since I kept wearing down standard thumbsticks in a matter of months and in search of a unique aesthetic upgrade, I decided to purchase this product.
I'm of two minds with these sticks; on the one hand, they look great, instantly eyecatching on any controller, they don't wear out like the standard plastic/rubber sticks. On the other hand they're quite heavy in the gate, adding weight resistance to your inputs, they cause increased wear & tear on the notches of your controller and they provide less grip overall. Their fit in the controller is also not ideal, they're not as snug on the stickbox as the standard, particular noticeable with the C-stick, and this leads to some rattling in the gate.
When playing, they're not as intuitive/user friendly as standard sticks, requiring significant adjustment to make use of effectively. Generally this means pressing down on them a little harder and frequently cleaning sweat off them and your thumbs. Their additional weight does also seem to lend itself to increased snapback. All that said, I've been using them with my GCC to play competetive SSBU for about 2 months now, and after making some adjustments to the way I use my controller, I'm very happy with the way these sticks play. They have experienced some wear, a slight fading in the vibrancy of the thumbpad of the Left Stick, as the the grip ridges are worn/polished by constant use. I imagine they'll keep getting lighter over time, like a metal handrail polished by years of use. Thankfully, this shouldn't affect their perfomance, unlike the loss of rubber tops from OEM sticks.
For me, they did exactly what I needed; they look great and they don't wear out. I love playing with them, they're cool to the touch, easy to clean and they really are the signature detail that makes my controller stand out. If you don't mind getting used to new sticks and you're sick of wearing out standard ones or are just looking for a snazzy part to level up the look of your controller, then these come highly recommended.
(avoided five stars, as they are rarely available in preferred colours and you will likely have to compromise)