Interviews are still the best way of finding out whether a candidate will be the 'right fit' for your business.... as long as you ask the right questions
For senior roles or positions with a specific competency requirement, psychometric testing is useful to identify the hidden aspects of candidates that can be difficult to extract from a face-to-face interview
The first 6 weeks in a new job has long-lasting impressions that influence their views about your company long after the 'honeymoon' period is over..... so it's important to get it right.