Thanks after reading about all the issues with the libre my expections are not high.
Do you know if glimp readings can be displayed in tabular format?
Not sure, it looks like it can log to a file but I haven't played with it. Glimp looks like it's quite capable if you feed it lots of data but I don't use it that way. Have you tried Liapp? It's much simpler, it has a log which shows you a table of all your scans and also has some debugging options that show the sensor data (the 15 minute readings).
I tend to use the Libre reader more than the phone apps as my phone (LG Nexus 5) doesn't seem to have a particularly good NFC reader, you have to line up the Libre sensor with the phone in a particular spot for it to work, whereas the Libre reader you just put it vaguely near the sensor and it works. The phone apps are great to have as a backup if I forget to grab the Libre reader. The Libre PC software is excellent for reports and can export data in .csv format.
I'm 7 sensors in and a big fan of the Libre, it's not perfect but I haven't had any problems apart from a couple of sensors that read low for a few days and the adhesive giving up if it gets too hot or sweaty from exercise, sometimes I use Tegaderm patches to hold them on but haven't needed to for the last few sensors. Summer is here in Australia so that may become more of an issue.
Hope it works well for you!