FS.com switches and WDM

Does anyone here have experience with FS.com switches and *WDM equipment? Looking to hear the good, bad and ugly.

Currently run all ~10 year old, lower end model Cisco (like different varieties of 2960, 3560, 3650, 3750, 2950 and alike) in a metro area fiber network, looking at update options on a very limited municipal government budget and not thrilled about Cisco’s current licensing model.

They look very good on paper, for relatively cheap price. I’ve got a small on-going lab project, will try to use one of their switches in it.