Just a few days ago, I finally received some of the TCXO parts that I've been planning on using with the Si5351A Breakout Board. I had no problem using one on the remaining prototype circuit board that I have, and at first glance it appeared quite stable and also very close to the nominal frequency (my correction factor for this one was only 8 Hz at 10 MHz).
Direct comparisons are always the best way to do things, so I ran the Si5351 with TCXO through my thermal chamber at the same profile that I did in the last test in my initial blog post. Rather than write a whole new blog post, I updated the original post to keep that data together, which will be handy for future reference. Go forth and look at the update at the bottom of the original post. Thanks!