Apollo Black ATX Mid-Tower Case with Clear Side
As you can see the fan placement on the side of this case is at the bottom.
That's ok but I would prefer it to be a little higher up closer to where the CPU fan is usually at on a motherboard to pull the heat generated from it away faster.
The less time warm air has to circulate before leaving the case the cooler the case will stay.
Here is the case with the accompanying included hardware.
You can see the plastic bag with the standoffs and screws to fasten the motherboard and...
Rails are used in some cases to attach the drives instead of using screws.
Even if this case had ten bays for drives in it, if they all required rails to fasten the drives in with you would be limited in this case to only three drives as that is all the rails enclosed with this model of case.
I prefer the old fashioned screw in types. They are a little more trouble when inserting drives but a lot more versatile in how many drives you can put in.
More screws are easier to find than more rails. Especially if its an older case the manufacturer has stopped production on.