I've had very few issues with my Ulysse - only real issue was that it was mis-built and I wanted it to be perfect! I only have the 2.0JTD (needed to watch the CO2 emissions for the taxman) so don't have the most powerful of engines, but it'll still pull 7 adults at 90 down the M40, so suits me just fine. Also, as it's a company car (and the fuel is paid for by the company!), I don't watch the MPG, but if not driven like a madman, I can get around 600 miles from a tank.
Some people have had electrical issues with their Ulysses, but then you can find similar stories for a lot of different cars out there (including some where you need to spend some serious money to get in the first place). Hearing some of the stories from other company car drivers where I work (on BMWs and Mercs), I don't think what you're seeing here is any different to what you'll see elsewhere.
The main things that drew me to the Ulysse were.....
1) value for money (at list price - all that matters in the company car leasing world - I could get more things to play with for the same money)
2) Safety - the EV2 (C8/807/Ulysse) and the Espace are the only full size MPVs with a Euro ENCAP 5 star rating, and as the photos in a link in another thread on the forum show, this is well deserved.
3) Space - while not the biggest MPV, it's one of the bigger non-Grande versions, and has a bit more space in the back than most (you need to use the space somehow - you either get legroom or space in the back, and I think the EV2 has the balance right).
4) Gadgets! Sort of links in with 1, but you can still get the WOW factor by turning up to collect your teenage kids and opening the sliding doors remotely for them! My kids love it, and they didn't want to see my last Espace go when its lease came up! Auto lights, auto wipers, satnav, full climate controll with separate zones, blinds, tinted windows, etc etc - it all makes the car that bit more fun! Mind you, having all the automatic stuff makes you stop and think when you get in and drive a 'normal' car!
5) Design, I won't go into Galaxy vs Espace vs various EV2 variants, but the extra Fiat styling is Italian, and looks in my mind better than the others on the road right now - things like the sweep of the side windows into the rear light array make this car look cool (if an MPV can look cool). The internal design is beautifully uncluttered (unlike a lot of other cars), and almost everything can be done from fingertip controls around the steering wheel.
My only regret is choosing the 2.0 JTD rather then the 2.2, but I had to do as much as I could to keep the tax impact to a certain level, and that was one of the easiest ways to do that :-(
John