Term life insurance vs Employer’s benefit

Should I keep signing up for life insurance that my emoloyer provides as benefits or should I get term life insurance from outside? With employer benefits, ~$500k life insurance is about $22 per month. From outside it will be around $50 a month based on my age. What are the pros and cons of each? I understand that I lose my insurance when I leave my employer, but I might as well get term life insurance after I leave.