If that meets your user requirements, then that's what matters. How many users, and how many documents, do you have, if I might ask?

Our XML columns, where used and when we had issues especially (we 'normalized out' the temporal data which made a huge difference), was on a tables that had 2 Million rows, and was used relatime by an online retail sites that takes, at peak, around 5000 orders an hour - or just under 1.5 orders per second. On average, the basket (which was the XML) was being accessed about 20 times per orders , so you can see that during peak trade, our XML column was being used, and potentially changed, in the order of 100 000 times in an hour, so the best possible performance is kind of critical 🙂