I used both Queal and Joylent for a long time. Queal has a wonderful selection of flavors but the powder never dissolved in water as completely as Joylent did - there were always dry powder lumps left in the shake. I did not like this.
I used both WundrBars and Twenny Bars. I found WundrBars to be too sweet (especially the vanilla) and they would always get stuck in my teeth.