I played a 360 for many years and just sold it about 4 years ago when we downsized our cars.
I have a decidedly different opinion from Ken and others about the tone.
For modern slap sounds, of course, the folded horn design does not produce the compressed/bright tone most guys are looking for.
However, for a pizz player using Fender single coils in a J, that enclosure is THE tone. And I NEVER heard any mud in it, presuming mud refers to distortion. Rather, that cab produces a cavernous clanky clear sound that is highly supported in the lower mids; perfect for the Jazz bass. Total synergy. Now, I will admit that solo in the music store, that tone can be "ugly." However, it is the tone supreme in a mix. Just another example of the misleading differences between auditioning an amp solo and getting it in the mix.
Some other things from my experience:
I never observed any influence of the cab vibrations on either the power section or the pre on top. They were built like tanks except for the infernal rocker switches.
Another thing towards the more modern tones: the amp had a biamp capability built in. I would periodically put my Flite 4x8 into the high end biamp out, and that produced an extremely versatile tone that could be used easily for the Marcus thing. Reason I mention this is almost no players ever took advantage of it, and most still don't realize that capability is there.
Finally, the more typical criticism of this rig was that the volume did not develop until about 30 feet in front of the stage; so, the player either couldn't hear themselves or was too loud. Well, I never experienced anything of the sort like that. I used to use that amp for everything from Holiday Inn band in the corner on up; never with any issues.
So, I will dissent; for my purposes, this was my favorite piece of gear built for bass to date, aside from the weight/size issues.
To the OP, if you can find one, can afford it, and have resources to move it around; then get it. There is no other amp currently produced that gets even close to the tone the 360 produces. I currently switch between 2 Tech 2x12's and an NV610, depending on the gig. They are both nice toneful setups. But, they ain't the 360.
IMO/IME