I got the spexcel thermal jersey a few days ago, but I caught a nasty respiratory illness on Saturday so I haven't been able to get out much.
The jersey is high quality and fits true to EU sizing (EU XS / Asian S). It has a light fleece lining, with tight cuffs that fits your wrists nicely. Combined with the compression, you could probably wear this in like 5c weather with a heattech base layer from Uniqlo and be quite toasty. Pockets are in a good position too - it's incredible value for the money.
The only points I have to dock off is that the first order came with a broken zipper - these jerseys have a rubber zipper, so the defective jersey had a broken in half zipper. Luckily, since I ordered this off of Taobao, the returns were easy. So, I got it exchanged and my sister returned to Canada. But I mention this, because Spexcel's customer service isn't exactly that good, especially overseas. Secondly, the lettering came with ironing marks. It's not as visible in person under natural lighting conditions, but something to note.