Based on a quick read of the link you provided, the performance that this solution provides seems to rely pretty heavily on their proprietary error estimation techniques. Without a more careful study of the approach, it would be hard for me to offer a simple "better than" or "worse than" assessment. We specialize in the sensors, this company seems to specialize in the algorithms. Typically, the difference maker in these types of solutions are the conditions under which they can hold the specified performance. Based on what you have shared so far, your conditions seem to be fairly benign so this might be a nice approach for you.
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