I've heard good and bad about O-Like. Honestly I don't know if it's worth it. I guess they used to be really good but now it seems some people are getting under powered lasers.
I wanted to buy from lazerer but other users said not to. Honestly though I think it would be okay as long as you get the power certificate. Lot of people who ordered with the certificate said it had good power. Although I don't know if any of these people tested it with their own LPM, as it could be wrong and/or fake(although I would hope they wouldn't). People who didn't get the certificate because they had an LPM, said they got under powered lasers. So maybe if you don't get the certificate they send you an under powered just because they think they can and you won't know. The certificate is fairly cheap so I think it's worth it in my opinion.
Again it's up to you, but I don't know if I would do it. It's hard to find a reputable source.