I have tried this and found it difficult to use the before meal and after meal settings as you have to keep switching the tag on and off.
The start up image is like a computer and looks very posh but then it does not use any graphics after that and is limited on what it can do.
You have the advantage of charging on the computer but if you lose the cable it can be annoying as you cannot just use it if it is not charged.
The screen is bright but the numbers and figures are quite small on the historypart and that is not helpful when you are visually impaired.