finicky

The capsules themselves can be a little finicky, so if fuss-free is your priority, you may prefer the PAX.

But the spring portal can also be particularly finicky.

The Medfly is not a finicky eater; its menu is as long as a Cheesecake Factory’s: 200-plus fruits and veg from every climate.

Its rice was a finicky crop that sprouts slow, skinny and tall, with fewer grains per bunch, and heads that can sag below the reach of the thresher and end up in the mud.

Hubble’s gyroscopes, which spin at 19,200 revolutions per minute, are extremely precise but finicky.