what are you thoughts? Good/Bad? Worth the money?
You're asking the wrong question. The first question you should ask yourself is: "What do I want to do with it"? An Amiga and an AmigaOne are two totally different beasts.
An Amiga is very slow, adding a graphics card is insanely expensive (and not really needed these days) and they're totally useless for today's computing tasks. Plus, the hardware might need some love before you can actually use it (recapping, removing batteries...). But depending on which model you buy, it's a cool reminder of days gone by, a collectible, the hardware project you always wanted to do or simply hardware porn. You can 'use' it to play old games, watch demos, try old applications you could never get your hands on back then or build a 1989 setup that can do DTP 1989 style and receive weather broadcasts via CB radio. Or you can spend hours finetuning Workbench to your liking.
An AmigaOne is relatively slow - yes, even the latest models - and insanely expensive. It can be used for about 15% (totally made that number up right now) of today's computing tasks - if you're a masochist. But you'll own a computer of which only a few hundred units were build, not thousands or even millions - so: definitely hardware porn. It doesn't really run old games or demos, but it runs Linux game ports and some old applications, plus a bunch of new ones. And the Workbench - or rather the entire OS - is miles better than the older versions, i.e. finetuning it should be even more fun if that's your thing.
IMHO: if you think about what you want it for, it will become clear what you should buy. Plus, as somebody already mentioned: both platforms can be tried out via emulation for a low price, you might want to give that a try before spending thousands of dollars.
