I have owned my Sting 2006 model 912 uls for 6 years I am second owner from new . It is fast and economical to run . It has well balanced controls and has no unpleasant vices. Vne is 165knts and stalls at 35knts and I cruise at 115 to 125knts depending on power settings. Mine has an airmaster electric cs speed prop which is extremely good and combines good short take off and climb 1000+ fpm and cruises 115 at 26”map . Only minus is it runs out of back trim for landing you have to hold a little back pressure on stick but only a little pressure required and it wiggles the tail a little bit in mod turbulence. If you decide to purchase make sure its had the heavier nose wheel strut upgrade which is one of the very few ad,s and bulletins on this aircraft . Tl ultralights have a very good maintenance manual and parts manual all available on their website. Annuals are a very simple task following the manual and requires very little airframe maintenance .
Hope this helps