I have heard good things about it as well, but personally, I don't see the need to spend money unnecessarily.
A bare glass plate (actually a cut down cheap mirror tile) heated to 60C works beautifully for PLA.
Same glass plate (mirror tile) with a generous application of Aqua Net Super Extra Hold hairspray and 105C works a treat for sticking ABS.
A can of the hairspray is only like $3.00 and lasts a long time.
SD4 #1 & #2 - Lawsy carriages, E3D v6, Rumba controller board, mirror bed plate, X motor fan, upgraded PSU & Mica bed heater
SD4 #3 - in the works ~ Folgertech FT-5, rev 1
Printit Industries Beta Tester - Horizon H1