I really like BLI and thus far have had zero problems. Watching some YT videos I'm seeing lots of problems, mostly with smoke units which I don't have. That being said, is there another brand that can compete with them that are as detailed, have good smoke units and sounds?
What scale? And since you mention smoke, should we assume you just mean steam locomotives?
I do HO and primarily diesel, but have a handful of steam locomotives for fun. This includes three BLI steamers: an ATSF 2-8-2 light mikado, ATSF 2-10-2, and an SP&S 4-8-4. The first two are several years old, the latter is fairly new. Of those, the mikado has been problem-free, still runs great and smooth. The 2-10-2 has been problematic. It ran fine for a while, then started making 'wheezing' noises when running, and "ticking" sounds when sitting idle. I suspect the DCC board is going bad, as the "ticking" sounds like electronic relays cycling. Someday I'll probably have it repaired, or the electronics replaced, but for now it's sitting in the closet.
Here's a video of the 2-10-2. If you listen carefully as the loco passes, you can hear what sounds like a squeaking or "wheezing" sound. I still don't know what's causing that. Everything is well-lubricated on the inside.
IMG_3664
I haven't run the 4-8-4 much, but so far it has seemed fine. Honestly, I didn't need it, nor does it fit my model era, but I had a credit to burn at an online store and it was on sale, so I splurged. Here's a video of an early test run:
IMG_4916
BTW, I don't generally run smoke, so I can't tell you long-term how any of the smoke units work on these. As you've mentioned, there aren't really many manufacturers that offer smoke and sound steam locos in HO. I've never really considered anything from Bachmann, as I'm biased based on my perception from years ago of lesser quality. Someday I may be able to tell you about an Intermountain steam locomotive, if they ever end up making that cab forward I pre-ordered about three years ago.
But I do have one other steam locomotive, a Walthers Proto 2000 CB&Q 0-8-0. Sound and DCC, but no smoke. It looks nice (actually has real chains hanging from the tender frame), runs great, and has decent sound. But unfortunately, I don't think they make steam locomotives any more.