My recent experiment on Amsterdam Unlimited has shown that a ckit, being able to heal a teammate with 3 hps and restore his ammo for 0.015*maxammo*maxclips has altered the gameplay hugely.
But unlike most of the changed I made before, instead of making the gameplay worse, it actually has improved it. I have seen a groups of 2-3 guns + 1-2 ckits coming from bases to make ambushes, and they lasted quite long. To encourage the healing, I have allowed ckit to reheal up to 110 hp. (does not really change a lot).
Server population also responded very positively on the modification, and some even called themselves "medic class", and submitted themselves for helping teammates and supporting offence.
What experience do you have about it? What are your thoughts or suggestions?
If someone else also wants to have a healing ckit on their server, I will post a patch for it. Its still a lil buggy, but not damagingly.