It's even more "FUN" on a trike when you take a downhill corner at speed with the inside wheel a few mm in the air.
You're feathering the brake just to keep the speed constant and you know if you let the brakes off you'll speed up and tip over and/or brake harder then you'll disturb the balance which will cause you to tip up more.
I've done a few of them .......
Upright trikes can be "fun" because they tend to suffer from camber steer if your not careful.
You lean right to counteract a camber and the trike automagically steers itself into the ditch.
And the more you panic because this happens then worse it gets .........

Because your that much lower on a bent trike then this effect is almost unnoticeable.
Recumbent bike are more tricky.
A rough rule of thumb is the lower and/or more reclined you are, the more difficult they are to balance.
So there is a much greater variation in how they handle vs upright bikes.
With a bent bike I'd always advise you try before you buy but a trike is just get on and go.
Luck ............