Edulab Nanoheat Hotplates....Good/Bad

I am looking into making a purchase of some hotplates from Edulab scientific resources. www.edulab.com for some of their Nanoheat laboratory hotplates. The trouble is I don't know enough about them as a company or whether the product is worth going for. Can anyone help? They look safe enough but as I will be purchasing several hundred I wondered if anyone had any previous experience with the company or the product?