Her reasoning on the Cruiser was as follows:

She had a budget set of about 1500$ tops. She rode two ez3's (one SX and one AX) and found them to be "weird." I think she meant a bit unstable, but they did not put a smile on her face.

They happened to have this used Cruiser on sale (1100$) and it had the right size boom for her. She got the smile, felt like she could see very well, and that it was very stable. It is a 21 speed I think. Lowest gear is 17 gear inches.

I've looked around and it's hard to find a better entry level tadpole trike than the cruiser. The sun ez3-sx is cheaper, but its the high sitting delta trike. WizWheelz has a cheaper model, but its a 3 speed internal geared hub.

Most of the rest were outside the budget range. The greenspeeds look awesome, but they start around 2500$. The Catrike that I have ridden (and loved) was around 2500$ as well. These are not cheap as there is no economy of scale.