A：It sounds that you have a high opinion of him.
B: He is an all-right guy.I have no bone to pick with him.
A: Birds of a feather flock together.
B: But he is not a fine weather friend who would sell you down the river.
A: You can't judge a person that way. I have a hunch that he is a sly dog.
B: Depends on with whom.He may be doing things on the sly.but he is honest with me. I trust him.
A: You can never tell.He might do you in when he sees an angle in doing it.