It depends on how deep your pockets are
There are hard to map and need a good Ecu so
I am told

For instance sbd is doing a loom/Ecu kit for 3k
Which is plug and play 300hp
So for time and effort it saves that ain't bad
But it is a lot to shell out in one go

But once you have gone balls deep on a pukka
Zetec turbo build plus Ecu it would probably
Be cheaper and quicker

These engines are going to get very popular
As they are light and have good power so as time goes
On the Ecu convertion should become affordable to most