If you describe something as perfectly good or acceptable, you are emphasizing that there is no reason to use or get something else, although other people may disagree.
1. completely and without qualification; used informally as intensifiers;
"an absolutely magnificent painting""a perfectly idiotic idea""you're perfectly right""utterly miserable""you can be dead sure of my innocence""was dead tired""dead right"
2. in a perfect or faultless way;
"She performed perfectly on the balance beam""spoke English perfectly""solved the problem perfectly"