I find there is a negative and positive to both sides,
mittens keep my hands warm as fuck, Where my pipe gloves, kept my hands warm (i have no clue how) but i was able to have free movement with my hand however i wanted. I used to love pipe gloves but didn't feel like dropping $60 so I heard all the hype with mittens a saw a pair of kombis or something for 15 bucks so i grabbed them. I'm SO happy with them, there so warm and super waterproof. And if you have to take your glove of it's about ten times easier then taking off pipe gloves. In my opinion, Mittens are deffenetly the way to go, On thoes warm spring days, who need gloves anyways? Hope this helped man!