We've not heard of any serious issues with the previous-generation 330e, other than some cases of the on-board charger failing. This is a £1200 fix, but most failed early and were repaired under warranty. Whether or not the extra performance and efficiency potential is worth it over the 320i is worth investigating: for example, if you can't charge it at home regularly then you'll find it's less economical than a 320i. But the reduced tax liability as a company car could offset that.