I've been using the Swift LT since April of this year and I too am a side sleeper who tosses and turns a lot! I like this mask as it is lightweight, easy to adjust, to clean and to wear. I previously had the old Swift II and the LT definitely feels less obtrusive on your face. The biggest issue I am currently having with the Swfit LT is the quality of the replacement pillows. The pillows currently being manufactured seem to be softer /flimsy, do not seal as well as the previous pillows and do not hold up as well. I'm replacing the pillows every 30 days. I wake up constantly during the night because of small (and sometimes not so small) leaks. On the plus side, my AHI stays under 5 and my flow (leak) rate averages between acceptable and up to 15% higher than the acceptable range for my average pressure. My biggest complaint for this mask is that it has been months since I've slept soundly through the night without waking to check or readjust the mask for leaks. To my knowledge, ResMed is aware of the complaints with quality of the pillows but gives no indication of changing their molds / production. As much as I like this mask, this issue is driving me to find a replacement from another manufacturer. I'm sure there are many people out there with no complaints on this mask - this is just my personal experience.