I've used Orange for two trips in France and had no issues. I wonder if the issue mentioned was buying something other than the "Holiday" SIM? The card works for 14 days from the day you activate, after 14 days you can add time/data to the card but you have to go to an Orange store to do it (rather than online or a Tabac).
Orange isn't cheap, I think I paid 50 euro last June. I just got back from Ireland and 3 Mobile offered a card for 20 euro that worked in Ireland and England, unlimited, for up to 28 days. It may be worth checking whether that's an option (probably not)? That said, Orange is considerably cheaper than using the international option on an American SIM.
I generally have the boutique activate my SIM and make sure it's working before I pay them. My trips have been more than 14 days so I've planned on when I would go to a store and activate the SIM - getting by on WiFi in the meantime. I've also added time after the 14 day period and didn't have any issues, other than cost. You don't have to add another 50 euro, usually another ten or so.
The other company I've purchased SIMs from in France is SFR. The first time it worked reasonably well. Second time, however, the SIM never worked. I went back to the shop and they said there was a temporary problem with their system and suggested it would work soon. I ended up being out 30 euro with no service (their SIM costs 30 euro but you have to add data/time so ends up around 50 or 60 for the entire vacation).