I like Apex for the most part. For a very expensive piece of equipment some of the pieces don't work very good. I'm about to dump the dos, it is constantly getting air in it. I adjust tighten and replace. The constant bubbles make it hard to get consistency. I had 4 days of consistent Alk, then today it dropped .4, I look and find more bubbles. I'm guessing if you want to use trident for consistency you'll have to use dos, which is very inconsistent.
I had thought about getting one then told myself not to do it. I read too many people with issues with it and having only 2 heads was definitely a deal breaker for me.