Cock pump thoughts so far

I started using a cock pump three weeks ago and I wanted to give my views on it so far.
The pump I went for is the Tracy Cox edge available from Lovehoney.i chose it for the internal length of about eight and a half inches as I wanted to have plenty of room to expand into.
At the start of the process,my erect cock was just about six inches,so I was looking forward to any increase in length I could get.after lubing my cock and the opening,I slid into the chamber and gave it two full pumps on the bulb.straight away I saw my cock grow to almost seven inches!I left it for twenty seconds then let the air back in using the valve then repeated the pump/release method for the next ten minutes.
Once finished I pulled my cock out of the pump and took hold of it.it felt harder and more sensitive at the bellend than usual so I had a wank to end the session.I have to say,wanking afterwards is much better than usual and I had a more forceful cumshot than I normally do.
Since the first use my cock now gets closer to Seven and a half inches during pumping and it feels like a firmer erection.it also takes three pumps to get to maximum,any more becomes too painful and I have to let a little air in.I also believe my cock is slightly larger on the soft.
I'm looking forward to the next few weeks and months to see how permanent the increase in size is. Cheers for reading this and I'm happy to answer questions about my experience so far.