How lately? They have been releasing quite frequently, and have worked a bit to clean up the UI and workflows after adding a ton of new features. I've been using it and it's working quite well for me after version 0.60-ish
About a month ago I think? It didn't have enough options to run the Coolscan 4000 ED I have lying about, at least not reliably, and I don't think it had any batch options (might be wrong about that). I don't really mind going through VueScan first but I'll take a look again soon and see if that area has been improved.
CoolScan support has improved a lot in the last month or so. I don't have one so I cant comment in practice, but its a very active project and I'd definitely encourage you to submit bugs if you have a coolscan.
Ooh great I'll check it out. I have a couple of them actually, although I couldn't seem to get one working through the complex series of adapters I had, so I'm gonna set up a new machine with an actual FireWire card and reassess it then. I do at least have one that works in VueScan so I can at least provide some feedback (it's a modded 4000 ED that does whole rolls).