Hello - I brewed the Endeavours kit as my first ever home brew. It was fermented for 12 days (starting specific gravity 1044, dropping to 1008) and I left it to bottle condition for six weeks now (with some judicious testing after four weeks).
After the first four weeks, the beer (and head) were decidedly sour. So much, that I was concerned I produced a batch that went off. But the self-doubt faded away as the favour mellowed to a lemony taste, then after six weeks, it was just pleasantly citrusy.
I'm somewhat baffled by the description provided by the manufacturer because I don't really taste any of those flavours. Fortunately, it's my favourite type of ale - light, zippy with floral undertones. It reminds me of Citra from Oakham Ales.
Anyway - very pleased with my first attempt. I also ran out and bought the Festival Ale 'Landlord'. It's been in the bottle for nearly 4 weeks. I have high hopes for this as well.