David B.wrote a review of Castelli Estremo Gloves on December 5, 2016
Familiarity: I've used it once or twice and have initial impressions
I've worn them on a 35-mi road ride that started at about 1-2ºC/34F. The tips of the ring and middle fingers soon got chilly and I had to wiggle them all the time. Not warmer than my 4 year old LG Thinsulate gloves which are less bulky.
Speaking of bulk, shifting (Sram Rival 10) was OK. Reaching into my back pocket for a 40g gel though was impossible!
The snot pad is nice but there's no phone touchscreen patch. On the plus side, the gloves are easy to put on and take off.
All my gloves (summer, including Castelli's own; fall; winter) are size M; I went for Large with these. They are snug inside, while, as already mentioned, being quite bulky on the outside.
I own a lot of Castelli gear and had high expectations for these, particularly considering the price....