Your oppinion on this exchange. Is it safe to use it?
I've just researched the site and it seems new to me as I never heard this exchange site before.
Some details about that site from who.is.
Registrar Info
Name: PDR Ltd. d/b/a PublicDomainRegistry.com
Whois Server: whois.publicdomainregistry.com
Referral URL: www.publicdomainregistry.com
Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Important Dates
Expires On: 2018-05-05
Registered On: 2014-05-05
Updated On: 2016-06-01
All I can say is use the exchange sites which is proven and tested by many than this new sites without any good reputations.
Your researches were useless. It is clear that the domain owner hiding his website details by using whoisguard.