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They are not very effective, I used my machine regularly and saw no obvious effect. Machines that are available for own use, do very little as they are aloud little power. The best thing to do would seek a professionals advice, at least that way you are guaranteed a result.

I’m not really familiar with the rio but I bought a TRIA about half a year ago
It was $1,000. I used it twice on my bikini area and saw about 10% of the hair fall out.
The “at home lasers” like the tria and rio have to be weak enough so you can’t hurt yourself, they are a class 1.
The lasers at the clinic are a class 4 – They are 4 times as effective.
I’ve had one treatment in the spa and half the hair has already fallen out. But my hair is dark black and thick and my skin is ghost white.

Which is the most effective colors to treat
Someone with tan skin and brown hair may not have ANY results
That’s why I couldn’t get my arms done

The at home lasers aren’t really strong enough to give you smooth skin
And if you read the fine print it says “hair reduction” not removal
I sold my tria and went to a medspa in houston tx

I paid $4,000 for my legs, underarms, and bikini area
And that’s permanent smoothness after 6 treatments over the course of a year…

I definitely think it’s worth it =)
Good luck with whatever you choose