Angles are as specified. You can verify these with a Polychrome or Beta screen-angle determiner. Halftone line count is as ordered. You can purchase a 10x loupe with a calibrated reticle to measure in 0.1-in. Multiply the measured value by 10 to determine your lpi.
Final image is the correct size according to customer specs.
The reason I am so cautious about these six factors is that they are often wrong. The linecounts, angles, and dot shape are often in conflict with what many service bureaus deliver to their other customers. This means that they often have to make special instructions to override default RIP settings to obtain what you desire. These instructions can be easily missed. The issue of correct size comes from having to resize output as directed by the printer, or enlarging to an intermediate file to a final size.