I had a Hickman line put in half way through chemo when my veins gave out and all I can say is that I wish I'd been offered it at the start.
I won't gloss over it - having it put in was not pleasant - if they offer you sedation or to be completely out, then I'd go for it . It's usually done in theatre to keep it sterile. My veins were small which was why they gave out but that also made it hard to get the line in. However, once it was in it was simply brilliant. No more having them search for a vein and try umpteen times to get blood, no waiting ages for chemo to go in through a vein that was really too small.
Chemo was far quicker and totally pain and discomfort free. I had no trouble at all with my line - no infection and no pain once the initial slight discomfort at having it there had passed after a few days and the stitches were out. I was very careful to keep the skin around it clean and my hospital's sterile procedure for flushing it and dressing it was absolutely top notch. I was given dressings to change myself mid-week if needed and I was very careful never to touch that area so it stayed sterile. I was able to shower as normal as I had waterproof dressings.
I was worried about catching the loose end of the line in my sleep and pulling it so I bought a couple of soft, stretchy breast feeding sleep bras and wore one at night with the loose end tucked away inside and that worked a treat.
So, despite it not being a nice experience having it put in, if (God forbid) I ever have to have chemo again, I'll be hammering on the hospital door demanding another Hickman line, so I think that says it all!
Oh, and having it taken out (three weeks after my last chemo in case I had an infection, so they could have used the line to give intravenous antibiotics if needed) was totally painless and very quick.
Good luck - I hope you love your Hickman as much as I did mine!