It is a very good idea. I don’t know where ppl get ideas like that and why I don’t get them, but generally really good idea. Here are my problems with it:
First of all, if is meant to be newbie friendly why not use sats price, instead they used mBTC. I had to google it to check if it really is 1/1000th of BTC. I thought it was a bit confusing.
More importantly, they are very expensive. They want 6.043€/BTC today, when based on exchange course it should be 5.625€.
I would rather go bitpanda.com and get my BTC for 5.589€ You can check yourself.
So I would say idea good, execution not so good.