I love these drops both the sucralose and stevia versions. BUT they have discontinued the stevia drops which I’m really disappointed. I’ve tasted both versions and although they are both delicious I prefer a natural sweetener rather than an artificial one.
Goes Well With:
Anything really

It tastes good and adds sweetness to unflavoured protein shakes. Thanks MP. 
Goes Well With:
Unflavoured protein powder.

Another quality product from MyProtein. The flavours are nice and the best part is lack of calories. I use them as a substitute for flavoured syrups, and also to add a little something to low calorie choices that are bland. It helps me to enjoy lower calorie food without feeling that I'm missing out. I started off with just hazelnut and toffee, but now I'm building up quite a range. And with them often being part of the flash sales, I'm constantly stocking up. Not that there is much need, they last longer than you would expect them to. Each drop packs a punch of flavour. Very God value for money.
Goes Well With:
Coffee Pancake batter (helps reduce the need for sugar) Breakfast oats

These drops are SO useful to keep in your bag. The toffee and vanilla ones are amazing for coffee and mean you save money on getting extra shots of flavour. I like to mix the blueberry and strawberry into oats or yoghurt, they’re quite strong which means the bottle lasts ages. Also the apple one is so good for water if you struggle to drink it! Highly recommend 
Goes Well With:
Oats, yoghurt, water, coffee, baking etc

Being honest I'm not 100% sure myself if it tastes like butter biscuits, possible more on the toffee / caramel side, but one thing for sure you won't be disappointed. I use it in oatmeal, yogurt, coffee, milk and mixes perfectly fine and isn't too sweet, a few drops will do the job. Great for cutting down on sugar intake. I haven't noticed any bad chemical taste, but just be cautious about how much you use. Overall great smooth flavour, 10/10.
Goes Well With:
Oats, yogurt, coffee

I thought the mixing of the product was great. I am not sure how strong the peanut butter ones are though. I use about 4 drops into my oats each day. However, I do use myprotein whey in chocolate mixed so potentially the flavour mixes with that which I love!
Goes Well With:
OATS!

Bought the toffee FlavDrops and they taste absolutely amazing. I’m kicking myself that I have not tried them before now. It gives a sweet toffee flavour to food and drinks with no bitter or chemical aftertaste that sometimes lets down zero calorie/zero sugar flavourings. Great value for money, bought them when they were on offer at half price, and even the small bottle contains 100 servings. 10 drops in coffee makes it taste fantastic. 
Goes Well With:
Coffee Yoghurt Whey Protein 

I wasnt expecting much from this but WOW... what a little gem I found, I had it with my Oats and it tasted like a milkshake, I ordered raspberry, toffee and coconut but have yet to taste them.... I might even put this in with my weigh protein shake too... just 5 drops is all that's needs dont go overboard
Goes Well With:
Oats Weigh protein shake Pancakes (mix)

Bought this a few weeks back to flavour my oats. This is a great substitute for honey and other sugary alternatives and it tastes great. You don’t need much at all for flavour so it will last!! Reasonably priced and you can also put it in shakes, smoothies, pancake recipes and coffees etc. Great versatile product!
Goes Well With:
all of the above 

Pairs perfectly with almost anything. From porridge in the morning, to a tub of quark soft cheese as a high protein snack. Especially flavourful and does not disappoint. 
Goes Well With:
Porridge Quark Greek yoghurt Impact Whey Protein - chocolate brownie flavour