experience working with virtual property managers

[Joseph Chacko vellukunnel]

I currently own 4 properties in new jersey, tenants actively managed through a property manager.  The PM is okay, and they are reasonably prompt at responding to our tenants and maintaining the property.  That being said, they're also not the best.  I wanted to check if anyone has experience working with virtual property management companies (Tech platform + someone at a call center managing tenant requests.).  They're less expensive, but are there other things I should watchout for?  Will it end up costing me more in the long run?