Got the Peach Gummi ring, it tastes really good (albeit artificial) and has no bad aftertaste at all. the powder itself does smell bad though, so get it in your shaker quick and don't inhale it. This BCAA definitely needs to be shaken up in a shaker cup to be fully mixed in. Tried stirring it a cup, and even just shaking it up in a plain water bottle but it gets clumpy when doing so. As for the BCAA effectiveness, I feel alot better after my workouts and labdoor gives this product a good review as well so works for me.
Goes Well With:
water and a shaker cup

Overall, the product is really nice! For now I tried only the Gummy Fish flavor and the taste was good, I like it. Honestly, I didn't find difference between high price brands and Myprotein BCAA. Anyway, the price are friendly, you can try it by yourself!

I order for the first time the fruit punch BCAAs and honestly taste really bad, it mixes really well, But the taste, no matter how much I tried is not god, again, this one, I don’t know the others. The effectiveness is on par with others I've had so I'm happy with that.  The powder is extremely fine like other reviewer was saying before and does tend to get all over no matter how careful you are.  The bag also does not seal properly which is also a bit annoying.  I just passed after few days to a different container. It also did not came with a measure cup or just a cup so keep the ones that you used on different products because you are going to need one. And also, the bcaa says that have 142 Servings and in the bag says 128 again is not that important but it is. Do you will get 12 serving less. I will change the taste and see how the others taste but again, because honestly the price is very good, but for me the taste is important and this one is not really good. 
Goes Well With:
Water 

My first order for these BCAAs were Raspberry Lemonade back in 2017, and they were the worst BCAAs I've ever consumed. I vowed never to order it again. Recently I've come across positive reviews that MyProtein have stepped up their game in a variety of their supplements, including BCAAs. So I gave them a shot again, starting with a 1lb bag of Watermelon, and samples of Snow Cone, Peach Lemonade and Rainbow Sherbert. Unfortunately the Watermelon had a weird aftertaste that I couldn't get over. However the Snow Cone and Peach Lemonade were AMAZING. I immediately ordered a 2lb bag for each flavour. With the latest order, I wanted to try all the remaining sample flavours. They did not disappoint at all. Here is my ranking after trying all the samples out: 1. Snow Cone / Peach Ring 2. Peach Lemonade / Blueberry Pomegranate 3. Gummy Fish 4. Rainbow Sherbert Note: I personally do not recommend getting Watermelon. The peach flavours were a surprise hit, and they tasted like ice peach tea. I can't comment on the effectiveness on performance and activity, but it certainly fits my eating habits (i.e. intermittent fasting).
Goes Well With:
Straight up water. I recommend chilling the water in the fridge first.

This stuff is absolutely horrible tasting, I've tried the cold brew coffee and unflavoured. Cold brew was at least drinkable, the unflavoured powder tastes like pure poison.  Another wonderful feature of this BCAA is how it absolutely refused to mix despite blending, shaking, or whisking. 
Goes Well With:
Disappointment

The BCAAs taste pretty good (not too much of that artificial taste) and it mixes really well. The effectiveness is on par with others I've had so I'm happy with that. The powder is extremely fine and does tend to get EVERYWHERE no matter how careful you are. But that being said, it's also easy to wipe off. Oh, and the bag it came in does not seal properly which is rather annoying, but tolerable.

Taste is okay, (peach rings, and snow cone), but it doesn't mix up well no matter how many times I shake it or how much I dilute it out. It's impossible not to make a mess getting it out of the bag. Unimpressed.

I was excited to try these BCAAs.  They didn’t mix well and it was hard to scoop the powder out without making a huge mess. The powder sticks to everything.  After taking these for about two weeks they made my skin break out all over.  Not impressed. 

I got the peach lemonade flavor and it tastes pretty good. However it mixes terribly in my water bottle even after vigorous shaking.
Goes Well With:
water

The taste of the unflavoured is bad as expected which isn’t an issue for me as I prefer to avoid artificial sweeteners. It’s the mixability that I can’t get over. I try to drink this before my early morning workouts and end up having to choke back a massive dry clump of BCAAs without gagging. I’ve had other BCAAs and while mixability is never great as the ingredients are hydrophobic (does not mix readily in water), it’s never been this bad even with a squirt of lemon juice. The price per serving is great so I’ll have find a way to overcome the mixing issue. One reviewer suggested letting it sit for 5 minutes, I’ll try that with some lemon. 
Goes Well With:
Lemon juice