It feels fine. You're passing out within less than 10 seconds without nothing. I didn't feel anything. The knot was on the back of my neck i places it beyond Adam apple as i did find easily thé sweet spot manually. I'm thin so i dont have huge muscles kidding the carotid.
So pragmatically, i was thinking peacefully, feeling nothing, if i remember well i decided to count numbers to see if it was suffisent or if nothing was happenning.
What i will describe now IS what i realised after , because when it happened i didn't realised. My vision faded, m'y thoughts faded and i passed out just like this within two seconds. So the whole hanging was about 6-10seconds i Guess. But you dont realise. It's like falling asleep quickly. You don't realise, you just shut down without realising.
So in this regard, partial hanging is not painful, it is very fast and not so complicated to achieved if you found your sweet spot already.
The problem is the SI will kick in violently when you pass out. Mine did, so my subconscious did stand up, i came back from black out, horrified and panicked of what was happenning and did put out the rope. I was choked, stressed and scared...
It was more if a try (and if it could succeed, i was good with it). I wanted to see if hanging was painless, cause i always believe it was about long minutes If asphyxia but no, If done correctly partial is fast and painless. But i dont think it's very effective. SI kick in when you black out. It acts automatically.
In this regard full hanging is a no way back ticket, but probably more painful in many cases. The knot will above the Adam apple and full body weight, Soyouz will compression the trachea and surely won't breathe normally like a partial. When i searched thé sweet spot it didn't work above the apple and m'y head was feeling, pressures, like exploding... So even if you pass out within ten seconds, those seconds will be long and painful. You will have time to feel pain, to be panicked and choked by your SI etc. It could be even worst, you could not be able to pass out or coming back and sufferings hardly for several minutes... Those minutes could give an impression of hours.
Night night is maybe the good alternate to have the peaceful ways of the partial without being able to Come back..