For an recording artist and an active musician the first and the most important thing is the quality. I guess I got used to Dunlop weight, fit and finish and it has everything I need - down to the last detail.
I actually have 2 of these 220 - one for acoustic and one for electric guitar - and they work great for both.
I keep them in a separate guitar case with the guitar that I am playing at the moment so they are always available when needed.
I have to admit I use Dunlop steel 220 slide more on the electric - I prefer glass slides on the acoustic. Sometimes, on the dark stage I will use the steel slide for acoustic because I seem to have more control and steel slide is much easier to see in the dark :D .
I have broken a couple of expensive glass slides in the past and having a steel slide on the hand doesn?t make me nervous about breaking it. I use ONLY Dunlop slides at the moment - for a good reson - price to quality ratio is unbeatable. As mentioned before, Dunlop provides all the measurements and slide dimensions and that is very important when you buy online. Perfect slide to get the job done.