As I often say, you don't get what you don't pay for. The B1W is a budget-level cam so you can't expect top-level performance from it though you do get a lot for your money. If the vid quality is good enough for you, it's low price lets you add a rear cam or equip a second car for nearly the same price as one really good cam
The Korean cams usually have good build quality and many features but are lacking in design development and often in vid quality as well. For the video quality they offer most folks consider them overpriced. Getting a tooth pulled is more fun than dealing with their customer service
BlackVue has the DR750S and the DR590. Thinkware has the F50 and the F770 (not tubular but a similar front profile). None are outright bad choices, just bad bargains IMHO.
The Innovv C5 is a motorcycle cam but the remote lens has a very small footprint. The Mini 9096 dual-channel uses a tubular form factor though in a larger diameter. You might also consider using the rear unit from a dual-channel cam with the main unit mounted elsewhere. And while Mobius is indeed an action cam, it is different from all the others in also being easily configurable to dashcam use without any compromise of the functions dashcam users want. The GitUp F1 is very similar save that it is a newer design with a better sensor and more capable processor. I can see this one eating into Mobius sales once the cap version emerges. GitUp is the action-cam branch of Viofo who makes the A119 cams. And of those, the A119 and A119S(Sony sensor for better low-light performance) are among the best dashcams made today. Lots of value with these, and the 'wedge' design actually hides well from the ouside in most cars
Street Guardian offers the SG9663DC with a wedge primary cam and a small remote. Unlike most other dual-channel units both cams give excellent vids. They are soon to come out with a dual-remote cam that will probably be the most discreet 2ch dashcam made. They are a little pricey but offer great performance, continuous development, and unmatched customer service
With so many choices available it can be tough to decide among them all
Make a list of the features you want and arrange them in order of their importance to you. Compare the list against the available cams keeping in mind that none of them will likely give you everything you want. Once you get down to a few choices compare the vid performance and reported user experiences. By then the best cam for you will emerge as a clear choice. There are more good cams at good prices than there were even just a few years ago and while it makes decisions tougher, that can only be a good thing for us!
Phil