Has anyone used AutoBuy - Relai or Kanga?

Hi, I have some savings I would like to put into something that has more potential than keeping it in a bank, so decided to go with Bitcoin. I have a pretty busy life, so unfortunately I'm not able to keep up with the chart and after research decided to just use one of the AutoBuys available.

Since I'm based in Europe, my options are bit limited but i have two options: Relai or AutoBuy from Kanga Exchange. Has anyone used either of them? Relai has a bit smaller fees but I'm willing to put $40,000 towards this within one year and not sure about the security of my funds. AutoBuy is a part of Kanga Exchange, which makes me more feel more secure but has a bit higher fees. Any feedback will be recommended!