i finally figured out why my cheesecake is falling.  I was removing it from the oven as soon as it was finished cooking. 
I realized a lot of recipes say to turn oven off and leave in oven for quite awhile.
I've make two in the past few weeks.  turned off oven when finished, cracked the door and left it in there and it didn't fall flat. 

Hmmm, Maybe needs extra eggs? 

When sugar is mixed into butter or cream cheese, like in cheesecake or cookies, the sharp crystals poke little microscopic holesinto the fat, causing a leavening effect.  I would guess artificial sweeteners are not so sharp.

I made my "sugarfree" cheesecake.  Even though i use sweet/low in coffee and drink diet coke, i really taste that artificial flavoring in baked stuff. 
also, my cheese cake was totally flat, only about an inch tall!  Anyone know what could have made that happen?

I must have an amazing springform pan, because I've made a ton of cheesecakes, and I have never had one leak.  I'd recommend the brand, but I got it at a secondhand store.

Mfamom - Let me know how your no-sugar version works out.  I would be interested to try it. 

Mfamom, that is brilliant!  My cheesecakes always leak no matter how much foil I use. Thank you for sharing.

Hi guys,
Do you know what is typical size pan?  I have a 10, 9 & 8 inch pan.  I'm making a cheesecake but no sugar/carbs.  do you think would work if i just pour the batter without a crust

The pan in a pan idea seems like it would work.

I'm making 2 for Thursday. I make cheesecake all the time and I've never done the water bath. Makes me nervous that water will get in, even if I wrap it.

DH uses a water bath for cheesecakes and also for his flourless chocolate cake. Such a patient man.

I am planning to make either this or a pumpkin cheese cake Wednesday for Thursday.

Ive never used a springform pan, so this was soooo confusing to me.  I've also never heard of waterbath LOL 
found this video
Super Quick Video Tips: How to Leak-Proof Your Springform Pan

How can you go wrong?  LOL.  Cookie dough and cheesecake!

Experimental cheesecake in the oven. Trying it with dough pressed in bottom of pan. Ds's best friend is home from college and his birthday was yesterday so it.sounded like a good excuse to make another.

do be sure to get the extra big and thick foil though! If it DOES leak, the butter seeps in and around any cracks, rips, or where there is a seam in the foil if you couldn't cover the outside with one piece.

If my recipe for cheesecake doesn't require a water bath - then I'll line a baking dish or sheet with foil and put the cheesecake on that or on the rack underneath it to catch leaks.  That way --- if it does leak and start to burn you can remove it easily and swap to another sheet.