Welcome to the Gang from Western Colorado.
Which trike kit to install is as subjective as which oil should I use (man, I can't believe I said that), or which women should I take as a wife. The heart wants what the heart wants. Ride them all if you can (trike conversions, not women), and go with what moves you.
Having said that, In my humble opinion, the builder is much more important to the success of a conversion than the kit. All kits have plusses and minuses ... but .. a good builder will make a conversion work as it was intended. Also it will make the owner a happy rider.
Like all major purchases, this one requires some research on the buyers part. You have come to the right place for info ... so delve in and make an informed purchase.