I've travelled in three of them.
Germany, from a user's point of view has been quite good value for money. Most of the network I have used has been operated with fairly modern stock, or refurbished stock. That's mostly around Munich & Berlin. There's usually been at least one member of staff about, on some of the Berlin RE & RB services guards have worked in pairs and there are plain clothes staff. So on the how safe, pretty good. Punctuality, usually OK but I did end up with a three ish hour delay on a loco hauled set when it sat down in the middle of nowhere in Bavaria. I have noticed there isn't much in the way of passenger amenities, such as at seat power & WiFi. There is also OA competition on some routes, I quite like the ODEG services around Berlin. The stock is a bit more modern, I can't recall if there was WiFi on them or not.
Switzerland, age of stock is varied, some 70s coaching stock last time I was there with some now quite elderly locos in service through to fresh out of the factory EMUs. SBB largely only operate on the standard gauge network and are very similar to DB except for there being more than one official language. It takes a while to get to most places, Bern - Basel being an exception now they have 125mph lines on that corridor, with Pendolinos. Punctuality, need I say more, this is the yodelling Nazis we're talking about. +/- 5 minutes was normal. It looked to me like they achieve the punctuality by having quite long station dwell times when much shorter stops would be the norm here. May have changed as it was a few years ago.
France. Don't leave the TGV network if you want to get anywhere. On the classic network speeds were low and stock varied in age. I quite liked the coaching stock of Mk.III vintage, seats were better than on the EMU I used only a week later (that was about 30 years younger as well). I did notice that on some routes which here might warrant hourly or better, there it was more West Highland Line frequency. When travelling to/from Annecy those infrequent services did cause extended waits in Lyon and Lille.
One thing all three had in common, availability of tickets was almost universal, even small stations had TVMs, and enforcement was by guards & revenue protection staff on trains and no ticket barriers. Also all have separate infrastructure companies, even though run by the same organisation. I didn't notice use of the RRB either, except in France where some services were replaced wholesale.