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I've had this kettle for something like 4 years now, and it's still just as good as it ever was.
First of all, for a kettle, it's pretty expensive. If you just want a quick fix, this probably isn't for you, but otherwise it's a good investment: it won't let you down.
First of all, it looks nice. The black/silver is a nice neutral combination which looks classy in any kitchen. The illumination feature is a nice touch but a bit of a waste of electricity: it's blue when it's plugged in, and glows red when it's boiling. It actually gives a surprising amount of light: enough to give a gentle glow to a corner of a room if you're being stingy with lamps! It's probably a bit bigger than other kettles of similar capacity (probably because the handle sticks out quite a bit) but not by much.
The kettle can rotate on the base, which has a space underneath for storing the cable, which is very useful for keeping it out of the way if you need to store it.
It has a pretty large capacity, which is helpfully marked both in litres and cups (which are actually quite accurate). The handle is very comfortable and means you can get a good grip even when it's completely full.
Probably the best feature is the speed of boiling: it's the fastest I've ever experienced, even for large volumes. I've been really impressed. Also, the concealed element means that limescale only accumulates very slowly (I used it for 3 years in East Anglia, with extremely hard water) so you get very little drop-off in boiling speed. There's also a small filter in the spout to collect what little scale breaks off.
Unlike lots of other kettles I've used, the top is very secure, which means that you never get scalded by steam when you're pouring.
The only (very minor) downside is that the spout is pretty broad, which means that it can (occasionally, and only very slightly) spill. This hardly ever happens - really scraping the barrel.
All in all, it's fantastic. It'll last you years, and deliver excellent performance, but only if you're willing to pay the hefty price tag.
1.6 Litre capacity Illumination: Blue on standby red on boil Easy view water window Polished stainless steel trim 3kW concealed fastboil element 360 degree base Limescale filter Cord storage & non-slip feet / Short name: Breville JK155