I use the LG el-cheapos with no fan and a hovabator w/o the fan, too. 
I have great success and use no moisture at all- don't even use a hygrometer- until day 18, when they go into a hatcher with 70% humidity and steady temps. Works 90% hatch rate or more on local eggs, 55-80% on mailed eggs, depending on time of year.
I'd love to have RComs, but then I'm never going to be able to afford those since I like to hatch 60-200 chicks at a time.