I received the Louis Garneau Lemmon Jersey last night and wore it for the first time today.
I ordered the Ginger in a medium. (Im 5'10" 152 (at the moment) 32" waist and wish I had a bigger chest. (Right now it's 38".) The shirt ran a bit long and I wouldn't' call it a race fit. It wasn't loose, wasn't tight but just right. (Kinda like the three bears and the porridge.) It did feel good and didn't sag at all.
When I set out for the ride this morning, it was in the mid 60's, light wind and the sun was popping. I rode about 21 miles, rolling hills with a light to moderate pace. It wasn't too warm so I got away with wearing my 2XU compression sleeves (just in case I needed to shed something if it got too hot.) The shirt kept me cool and breathed really well. I could see this be a huge benefit on a hot day where I'd be sweating a lot more.
Overall I really like the shirt and look forward to wearing it again.