Get Switchy LTD as long as you can.
Working perfectly, adding UTM, A/B testing etc.

For me, only the process of adding a new domain was taking always hours, before it got working (even with cloudflare as registrar) - but when the SSL is issued, all is working fine.

Some features I'd love to see in the future:
- custom bounce pages (specified url when user hits the back button)
- exit popup's
- countdown and scarity timers
- addition of social proofs (own or 3rd party apps like wisernotify or evidence)

keep on updating!