I think I've had the Ergo 5 string now for about 3 weeks?, maybe a couple days short of that. In any event, it's very good overall.
A couple of observations:
(1) The action is set a little too low for me. The fingerboard buzzes a bit too much for my liking. Jesse states that he sends them out this way because most of his customers are BG users who are transitioning to UB//EUB. So, I started on UB, and perhaps I could use higher action. Jesse's solution to this is a wooden popsicle stick under the bridge to increase action a bit. I cannot imagine that a pine popsicle stick under a maple bridge is ideal, so I plan to either try to carve a new bridge myself (or modify an UB bridge) or spec out a new maple bridge and have someone else make it.
(2) The tone control on the back of the Ergo has an almost imperceptible effect.
(3) I am presently running it through a Behringer BX600 practice amp at home (in the studio we rent, they have an Eden WT600 but haven't played through that yet...optimistic). The BX600 has an Active and a Passive input. The bass sounds a little better through the Passive input...maybe that's impedance, maybe it's just a db filter...dunno. I can eq it so that it sounds very electric, fretless slab-like, or I can dial it in so that it sounds more like an UB, but it is not a direct replacement for an UB sound. It is a cool sound, though. It's got more thump than a fretless BG. Sounds good with 'unplugged' tunes, jazz. I am liking it.
(4) I played it through a GK400. Liked the sound, but it wasn't really loud enough compared to the BX600, so I didn't buy it. Same thing for an Ampeg B2R. Good sound with an Ampeg 410, but not loud enough to add to my gear. I think I am going to buy a GK1001RB II and mate that to an 8-ohm 2x10 or 2x12 cabinet like the the ones that Dr Bass offers.
(5) I have ordered the Undercover NS case from BassCentral as a gig bag for local travel. I have someone building an Anvil-style ATA case for air travel. Will be much less expensive than the cases offered by NS for air travel.
Overall, I am pleased with the purchase. It is much, much less expensive than other comparable instruments. It is much better than the comparably priced Dean, which I really didn't like (and I played it many times because I was trying to convince myself to like it). So much happier with this. Regarding other owners observations about the loose stand mount, this must have been designed-out of later models. Mine is rock solid. Regarding my concern over getting used to 5 string? It took a week to figure out what a great thing a low B is. Fun having that there for impact.
Thanks for everyone's input.
Neal