Here's my progress on growing 1 1/2 inches with LSJL. You can follow all my height increase progress <-here.
St.it from grow tall forum grew approximately 0.6" with LSJL.
R. Venter grew 1/4" in about 3 months.
Slimchanse grew 1/4" in about 3 months.
Here's a report from a person who grew 3 mm in 3 weeks.
Growth from TJC on comments in experimental LSJL height gain routine page: