I own the Eureka - for my purposes, and the price I paid, it's fantastic. It grinds great for filter coffee, and I can fine tune it to my heart's content. It gives nice, consistent results.

But you're right, the retention is not good. I'm looking into getting some sort of 3D printed bellows so I can flush out the retained grounds - I've otherwise resorted to tapping the hopper a good few times to get the last gram or two out.

I did originally consider the Fellow Ode 2 or the Opus but the price was just too much. I'm sure they're excellent but I couldn't justify spending so much money, €180 for the Eureka is already quite a lot.

what about the baratza esp?

That’s a tough one. I would say if you want to just do filter coffee, go with the Eureka. The Opus claims to do it all but typically, a jack of all trades is a master of none. However, if you do anticipate getting into espresso, it may be worth saving up for the Opus.

My use case is mostly espresso with an occasional crank out to coldbrew, which is a bit different than "filter," but I'll say I'm very pleased with the Turin SK40 I picked up a few weeks ago so far. I was also eyeballing the Baratza Encore ESP and Fellow Opus in the same general price/performance class, and decided to take a gamble on a fancy option from a smaller "manufacturer".

I quote because, as far as I can tell, it's an ODM customized Guangzhou Itop IT-CG100B variant, but none of the other dealers seem to have a version with the step-less adjust worm, side switch, apparently the burrs vary, etc.

The workflow is lovely, retention is nearly nonexistent, noise is not obnoxious, adjustment is easy and precise, etc. Longevity, obviously, remains to be seen.

Have you looked at Hoffman's review of the fellow on YouTube? I think the fellow is a very strong choice

Just ordered my first electric grinder yesterday. Got an ode v1 refurbished for like $150 from fellow and free shipping. Seems like a decent deal and can always upgrade the burrs later if I'm itching for more. Will let you know how it compares to my usual hand grinder and v60.