I'm presuming you refer to the model with the mechanical stage:
I have not used that model, but I have some thoughts.
For an extra $75, you might want to consider this one instead:
It has the low mounted coaxial focus knobs that will make it more comfortable
to use, but more importantly, it can be upgraded as your funding improves to
include dark field condensers and phase contrast, and a temperature controlled
stage warmer (for incubating cultures as you examine them).
You can upgrade either scope with a better set of objectives as you get more
money, but the less expensive scope will not accept a better substage condenser.
The substage condenser in the more expensive scope is better, with rack and
pinion instead of spiral focusing.
The more expensive scope has a larger stage, which will be useful if you are
examining cultures in a Petri dish.
The more expensive scope weighs twice as much, which can be good (stability)
or bad (portability).
Personally, I prefer backwards nosepieces for the objectives, as it makes it much
easier to see what you are doing (the unused objectives are out of the way in back).
Has anyone used AmScope 40X-2000X?