Good to Go. It dries the fastest and gives a glossy, almost gel-like finish without shrinking at the tips.
Gel Couture Top Coat is thicker and glassier, but only worth it if you’re using the Gel Couture polishes.
Speed Setter is fine, but I haven’t found it any faster than Good to Go and the shine isn’t as deep.
No top coat has saved me from myself, the phone goes in another room before I start.
Good to Go gets gloopy once the bottle is half gone and a few drops of nail polish thinner brings it back.