I purchased 2 of these Jerseys having never purchased or worn any tld jerseys. I had become fond of 3/4 length sleeves for mountain biking here in socal, liked the colors of the jerseys, and had enough gift card money to pay essentially nothing for the two (which were on sale for $35). The pocket though small is very handy, though I wouldn't recommend putting anything super heavy in there as it will pull the jersey to one side. I was able to put a small patch kit and cereal bar in there comfortably, both of which were not super heavy, so the fit was still spot on. The integrated google wipe is great. My first ride started off in warm 80 degree weather and then rapidly turned to heavy rain and the temperature dropped over 20 degrees. Throughout the entire ride, the jersey was spot on comfortable, and though the jersey stuck to certain parts of my body when it was wet, it still felt loose and comfortable. In the almost 90 degree heat on my second ride the jersey didn't feel hot at all, and infact you could feel the air flowing through the jersey even on very slow climbs. Keep in mind however that it still is a tiny bit hotter then a classic short sleeve jersey. I took a spill hucking off of a step down I had done only a couple times and landed on my side. My elbow was mildly scraped through the jersey but the jersey itself had NO physical damage. I'm 100% convinced the jersey covering my elbow protected a lot of blood and scrapes. The fit of the jersey is spot on for me. I am 6'3'' and fairly long built with long arms and legs, though I'm not skinny. The large fit me perfectly. If you are wider or have big and wide arms I would recommending maybe sizing up. For me personally, the fit is perfect. The neck and back is strechy and breathable. The chest and shoulders are nice and loose, yet not too baggy and the arms are the same, though they taper towards the cuff so they remain almost in place which I find awesome!
None as of now for me personally. I will say, the jersey is hotter then a short sleeve, but that is expected and a trade off for the added protection. Arms might be a tad too tight for those will very big and muscular arms. I haven't personally tried them with elbow or arm pads but I feel like they would be a tad too tight.
For my first taste of TLD apparel, I'm enjoying these jerseys hugely! These jerseys are everything I look for for all day rides and technical terrain here in hot socal. Arms could be a bit looser if you have big arms or want to wear arm pads, but for me, they work great.