i had a port put in in 2000, had it removed in 02. my main problem with it is was that i have really sensitive skin, so whenever id have a needle in, id get all swollen around it. im also pretty thin and you could notice the port very clearly, regardless of what i was wearing. they told me theyd put it in the top of my breast tissue so it wouldnt be so noticeable, but... it was. being 18 and having a red swollen lump above my chest was not happening, and i had them remove it. it left me with a pretty nasty scar too... and you could see the tubing go up my neck. now, im not super skinny, im 5'3" and at the time probably weighed 105lbs... i had enough boobs that i thought it would hide it, and figured benadryl would fix the hives... but nothing made me feel better and i fought tooth and nail to have them remove it.
on the other hand.. i think they are incredibly convenient and if i can handle the itchiness now, i might condsider getting another one. though doing the vest while having a needle in was very very uncomfortable to me.
just my .02. good luck with it... i know since then theyve made some huge changes in them, and theyre smaller than they were when i had one... which was about the size quarter in circumfrence, and a quarter inch sticking out of my chest.
sorry i babbled, still stuck in the hospital, and am boooooored out of my mind!!