Vast majority of the Amazon reviews are solid 4+ stars, and it has an overall 4.4/5 rating. Those few negative reviews are literally the same kinds you'll find at all the other juicers from low to high-end.
I don't know about those few others but mine's great. Plus, most juicers are plastic. Only the screens and sometimes the augers are metal.
OP can do their own DD, but here's a list of the high-ends (which is probably unnecessary for just juicing ginger):
The Best Masticating Juicers of 2021 - Slow Juicers Reviews (juicersplusblenders.com)
I've only ever used Breville centrifugal (not great), Slowstar (very good) and Omega (also very good). High-end Omega vs high-end Slowstar is too tough to call. Both are great, you can't go wrong. BUT for the price, juice yield, and amount of juicing I do (once a day, mostly leafy greens and carrots), the Omega 365 (low-end) is perfect.
Hope that helps!
For larger, firmer produce like pineapple, apple, cucumbers, etc., a centrifugal unit is perfectly fine and tends to be a bit easier to clean. Masticating juicers will handle just about anything including, berries, spinach, kale, etc.
For orgeat, we need a blender or food processor. A 4-cup Cuisinart FP can be had for $50. A Ninja blender can be had for $90.
A brand new centrifugal juicer, suitable for home use, can be had for as little as $65. A two-speed unit is most versatile. Ultrean and Hamilton Beach both make affordable models. Breville makes excellent units but start at $180. We use Brevilles in our programs.
Masticating juicers can be had for <$100, like this Omega H3000D. Ninja and Cuisinart both make decent, affordable models. Our juice bar uses a higher end Omega and it only struggles a bit with wheatgrass.
You can probably find a used centrifugal on EBAY for $50-ish and a masticator for $80-ish. I suppose it all depends on how important a new, warrantied model is to you and whether new is worth an extra $20 or so.