Whether that's a good number or not entirely depends on what you're selling, and how much of it. I recall you saying that you intentionally do not sell much on eBay due to "staying below the threshold of reporting taxes"... If that is still the case, that would explain the high sell through rate. But that does not mean the same sell through rate would apply to commercial sellers on eBay.
Regarding advice that is good or bad, I think our reputation and experience as a seller speaks for itself in terms of if we know how to make a solid performing listing or not.
Besides, we're giving the information that eBay has directly given us, which coincides with the updates that eBay has done over the last few years.
I advise any readers to take your advice of focusing on description ahead of item specifics with caution. Description is one of the least relevant areas on the entire listing page statistically.
You don't want to have a "bad" description, but your description scores better if it is primary text based and readable by the system, summarized of only accurate and relevant information (as too many characters ranks you worse in eBay's search), and does not contain too many images (as this is another thing that degrades you in eBay's system). And per eBay's own advice, if there's something important to mention in your description, it's even better to put that information in the additional images, as far more buyers check image than description.
EBay has charts which show how much more of an effect adding information to images rather than description has on conversion rate. You should inquire with them about this. Or watch the webinars, where you will find detailed presentations mentioning the information I've included here.
At the end of the day, it's a far better use of time for seller to input relevant item specifics, than it is to focus too much energy on the description. A summary of all important information is fine. Too many fonts and images is not necessary, and too drawn out of a description will give you a penalty in search.
Your advice directly conflicts with eBay's. This is why I ask you please not to spread information to sellers that may cause them to put in more work for less sales.
