Hiya, and welcome to the forum
Dont worry about asking questions that might sound silly to you - the only way to learn is to ask questions
This isnt a silly question at all!
Perfecto tanks are very good tanks, but they can be very heavy, so can be awkward to clean - especially under the shelves, as it can be hard to reach inside and under the shelf.
Also, the plastic vent can encourage chewing - and it can get damaged if chewed too much! and eventually fall out!
I know i have just listed all of the bad points, but apart from those, it is a good tank - if you dontmind lifting something quite heavy. I have a few of them and i have cut out all but one shelf to make it easy for cleaning, and i only put my non-chewers in them - they are especially good for any hamsters that will use a box or jar as a their toilet - as then it isnt so hard to clean - although it can get a little sweaty if they sleep under the shelf!
I much prefer normal glass tanks, without the shelf at all - as i find them much easier to clean! and there isnt the problem of the vent being chewed either!
Hope this helps
Tammy x