I got one for £50 (the 'Dot') more as a laugh than anything.
Found it more useful than I at first envisioned (for the time (too lazy to look at my watch), the weather, adding up numbers and the odd spot of Radio 4).
Then found myself perusing the 'Lighting Department' when She That Must Be Followed Through Shops With Wallet was, you know, buying crap for the house.
Got myself some Hue bulbs. Also more for a giggle but also to show that I too can buy domestic things and be all homely and nesty. Anyway, they ruddy well worked. So I bought some more!
However, I've now programmed it to query my database.
"Alexa, how many widgets sold yesterday at so and such" ....
and a whole lot more.
It's given me cause to raise an eyebrow :-)