I'm registered on P2PB2B not so long ago (probably for 3-4 months), still I'm quite satisfied with the services they provide. I heard a lot of users complaining about withdrawal delays, long support assistance, and other related things. Luckily, I haven't faced such issues yet. Also, I got to learn all the documentation provided on the website and didn't notice any suspicious things. So, I'm supposed to watch this exchange and continue using it.