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.
Depends on how far you want to go with the possession. Is it going to be a partial or complete possession?
With a partial possession, you won't notice much going on, but that depends on the speed it happens and on the terms of your binding.