I think if you do a search someone has said good and bad about just about every product out there.
Search LG incubators you will find the are the best for your money, and that they are junk.
Same with waterers, plastic is the only way to go, and never buy plastic waterers again etc.....
Same with feeds, medication, candlers, if you can name it there will be 2 people with extremely different opinions, so best you can do is ask and see how many respond with positive vs. negative feedback on whatever product you are thinking of purchasing. So unless it is something completely new you should be able to get some kind of feedback already, either by asking or by searching to see what others have already said.