MRC CR-4 Dual Chamber Rex any good???

[dragonfisher33]

Can't seem to find review on this product at all even though i see them for sale online for >$400. Are these any good? I got it used for $50. Yup you read it correct, I got the reactor, American...something pH controller, 5lb co2 tank, and something else for $50. Just need feedback on the product.

 

[Radman73]

MRC makes great products. Some of the best in the business IMO. Very pricey so great deal on a used piece.