Not really. I haven't experienced a complete possession so far. But it depends on how you go about it. For me, it was a case of summoning the spirit I was making a pact with, and then inviting it to possess me to the degree required for the pact. If I was going for a full possession, I would tell the spirit I intend for it to possess me completely, and then negotiate the boundaries and terms for that.
Not really. I haven't experienced a complete possession so far. But it depends on how you go about it. For me, it was a case of summoning the spirit I was making a pact with, and then inviting it to possess me to the degree required for the pact. If I was going for a full possession, I would tell the spirit I intend for it to possess me completely, and then negotiate the boundaries and terms for that.