Finally a thread where I can voice my expertise in. Ive skated rails since my first setup and love them. Ill give a lil rundown of all the rails ive tried in no specific order.
#1 Powell: Mediocre at best, shape of them is weird, really thin but very tall. Also they have a really weird soft plasticy feel to them which I really hate. Instalation is a bit of a hassle but doable.
#2 Enjoi: Pretty good but theyre pretty short and are made out of a very hard plastic, instalation however is a dream.
#3 Welcome: Fun novelty coming in packs of one but I find them way too thick personally, double sided tape is genius but they are pretty pricey. Grabs work amazingly on them.
#4 Pig: To start off pig has by far the best shape and colour options out of all the rails ive tried, they also are made out of really good plastic. However, the screws they give you dont fit in the holes.Everytime I get a pair I have to reluctantly grab a razor blade and whittle the holes down to make them wide enough to fit the screws. Even with all the work I put in to make them skateable they still fall off my board or rattle like a motherfucker everytime I skate them.
#5 Madness: Basically enjoi but ive only seen them come in obnoxiously bright yellow with writing on the side, they lasted me a pretty long time tho.
#6 Heroin: Best. Rails. Ever. They are the perfect height and shape, they screw in perfect everytime, amazing plastic and they glow in the dark. Only gripe with them is that they dont have any colour options besides glow in the dark green.
I ride most of the time only one rail but Ill occaisonally put two if the graphic on my board is really sick or if im feeling like doing some weird tricks.