Checking what VLANs port is member of is not quite user friendly, as on VLANs tab user must move mouse over check boxes and wait popup to see which checkbox represents which port.
On the other side, on VLAN tab, there is readable list of ports but no information which VLANs each port is member off. It would be great to have it displayed there. Even better - if user could set VLAN membership on that page too.