CZ makes excellent rifles. Their rimfires are usually compared to high-end rimfires like Anschutz, Sako, and Browning T-Bolts. Their centerfire rifles are usually compared to things like Sako and Weatherby.
CZ's quality is absolutely exceptional for the price bracket that they sit in. Their 550 series of rifles are priced to compete against guns like the Winchester Model 70, Browning X-Bolt, Tikka T3X, Savage 116, etc. Their quality sits a realm above, though. In terms of quality, I'd be more apt to put them in the bracket with the entry level Weatherby Mark Vs and the Sako A7s.
Their rimfires are priced to compete against Savage, Ruger, etc., but again in regards to quality they are more along the lines of an Anschutz, Sako, or Browning T-Bolt. Czech labor is cheap, but CZ uses really high quality materials and workmanship to build their firearms. You combine those and you get an absolute steal in terms of quality of gun for the money. Same reason why you see some of their beast rifles like the Safari Magnums in .458 Lott, 416 Rigby, 375 H&H, etc., for just barely over $1000. They're built like tanks, but the labor to make them is cheap.
The only other comparable rifles overbuilt for high calibers near their price range is the Weatherby Vanguard which is made using the reliable and overbuilt Howa actions. You can get them in 375 H&H and 300 Weatherby Magnum for like $700.