Old Second National Bank in Glendale Heights receives consistently positive reviews for its excellent service and helpful staff. Customers describe the team as very nice, well-trained, and professional, often going above and beyond. Reviews highlight a very welcoming experience for opening new accounts, with great and quick service. Many customers recommend this bank, noting it as a good alternative to larger institutions. The branch maintains a strong focus on customer relationships and prompt business support, creating a positive start for new clients.