Worst ice cream I've ever had. Weird, grainy texture.

wait, how was that supposed to make me want to eat ice cream?

As far as low-cal diet ice cream goes, Halo Top is actually pretty good, I think, but it's crazy fucking expensive for what it is. (typically about $4 a pint).

By far and away the best sugar free ice cream I have ever had is Clemmy's which uses sugar alcohol and stevia, but I don't think they are business anymore. A few years back I noticed every store in my area began phasing out Clemmy's (even supposedly indie-edgy Whole Foods) and soon afterwards the company launched a lawsuit against Nestle claiming that Nestle somehow secretly negotiated pushing out Clemmys from stores. I don't think the lawsuit went anywhere, but it was real interesting how the stuff disappeared from shelves instantly right before the company made that claim.