Apart from being someone you trust, the person ought to have make use of the service too, I don't think it is enough for someone to just recommend something to you just like that, I think such person will have to make use of the service atleast with that he or she can actually come up with a good reason why he should be recommending such service, recommending a device when you have not actually make use of it is risky that's why it doesn't even have to come from a total stranger, that's my take on this.
Basically when someone is recommending something to you it must have to come from personal experience. It is not wise that you accept anything they tell you because you trust them without asking for proofs. My dear, we are talking about money here, no matter how small the Bitcoin is, which I know people with small amount of Bitcoin wont even bother trying to get back their wallet because the cost for rendering the service will be higher than the amount of asset they have in their lost wallet.
Yeah I totally agree with you because this recovery does not look to me it's an app that one log unto and input details to get back your loss wallet from what have so far about what keychainX offers I think information on the recovery process is sent and discovery is done . So aside trusting who is introducing the process to you, you also find some trust in the process just so you will be sure not to lost your asset
If you want to verify the procedure the process and the services then you can do and be sure if their services before venturing into it