I've done so many of these kits and tasted them brewed by other novice home brewers. I've generally been satisfied with the kits, but I have always used liquid yeasts with them. I varied the op up water, totalling between 19-24 litres.
Sometimes I found the beers to be a bit heavy for style. Some excellent variations as you play with yeasts and additives. My recommendation is to use a proper amount of yeast to minimize off flavours. I used to use liquid smack packs that had 100 billion cells max for the kit beers that required around 160-180 billion cells. It can funk it up a bit.
Honey Blonde ale is great with a British Ale liquid yeast, though slightly too much honey for me.
Cream ale kit was great, again with too much sweetness and candy like caramel flavour. I also tried it with Kolsche yeast but found it was too dark and cloudy of a beer to fit style.
I tried the Prairie Wheat a few times, one time with Hefeweizen yeast, it ended up tasting slightly like a saison, I may have messed that one up (3 years ago).
Stout was a little Weak in my opinion and could have used some steeped chocolate malt or something.
Anyways I could go on about all of them. They're great for a beginner, or when you don't have time for a regular grain and extract batch. Just keep sanitary during your procedure, use a good amount of yeast and keep the temps in the sixties or low seventies tops.