OpenOffice.org offers similar test drive. It's not only a test drive, as if you enjoy the test drive, you can keep the car. And without any other extra cost.
Online test drive is of course not a new idea. You can try - at no charge - online test drive of KOffice. You can also, when you don't have fast Internet connection, try it offline. No installation is necessary, really no hassle. No harm will be done to your computer. And no ActiveX. You can even test drive it as long as you want, as if it is yours.