I wouldn't call it "one of the most hated Macs ever". It's just kind of ... meh. Not as easy or cheap to upgrade as the contemporary PCI Macs, not as horrific as the botched 52/62xx series. It does the job, but I wouldn't cross town to get one. It's good that you got the 200MHz version.

Note that there are some significant differences between the 160 MHz and 200 MHz models in terms of memory capacity and expansion slots.

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FWIW, I wouldn't waste big bucks on any upgrades I couldn't transfer to a better machine when one comes along.