Are Derma Rollers good? If so, which one should I buy?

[HelpingIsMyThing]

I'm looking to improve my skin as it's aging and looking tired. Are Derma rollers actually any good? Thanks.

I bought one ages ago, didnt do anything for me, but make my skin very dry, but i think you would need to use it regularly, and i dont think a home use one will do as much good a a salon treatment as they have longer spikes and it needs to bleed apparently to work
Hope this helps