The Freestylist UL has the same low window as the WMUL. I have flown them both back to back many times.
Both are true ULs and fly lower that all my modern UL trick kites except the Shadow.
True bottom end is based on the pilot skill level. The freestylist is a very easy kite to fly at the bottom of the wind range. Easy to control and the sail loads up nicely. Had my shadow for a year but was never able to fly it that low. In light wind, quick hand movements or a sharp turn can unload the sail and stall the kite. Never understood why the shadow would suddenly stall and I was forced to run and pump the lines to keep it in the air, with John Chilese shouting instructions to me.
With the freestylist's (and WMUL too) strong feedback though the lines I felt the kite depower from my poor technique long before the kite stalls. This allowed my to finally learn low wind skills and stop Chinese from laughing at my poor low wind style as I ran around the field.
The freestylist is such a good kite to get anybody started at a low entry price. I recommend it highly.