I was using SERSitive substrates for surface-enhanced Raman spectroscopy under green light excitation and what I can confirm is an excellent signal enhancement of 4-Mercaptophenylboronic acid. The signal intensity was very uniform in different sample point as well. Even more important was the constant technical support from SERSitive company which included not only the regular procedure for sample handling, but also a small, but very useful tips. Therefore I strongly recommend SERSitive substrates.