I just tried it and indeed it is very fast, but due, I think, to restrictions placed on the device by Apple it can only display the record not allow editing of the record. So if you want to send an e-mail to, or call the person you're good, if you wanted to use it to add additional information to the record (new phone number or whatever) I do not think that would be possible....
Or doesn't appear possible, but I'm new to this 😉