This is probably the weakest in the Desert of Desolation series because it is the most linear, and a lot is just grand-standing. However, the sea of glass is still one of my favourite concepts in a module, the tests are pretty cool (the Crypt of Al-Alisk is quite weak) and the Garden of Martek (with the Maddogs and Guilders) can be fun (reminds me of classic Star Trek).