I've also got this propogator, when I first got it I thought it was huge, but its amazing how long it was kept full. I like the fact it is high enough to fit rootrainers in, which means all my sweetcorn, sweet peas, peas and beans germinated much more quickly because I could fit them in it. The thermostat seems pretty accurate and you get good results. The only downside is if you have to place it indoors they are quite long and take up quite a bit of space, I am waiting to get electrics fitted to my greenhouse so haven't tried it in there yet but would be interested to hear from anyone who has used it in an unheated greenhouse.
You can dismantle the sides which are held together with little screws, but the base is in one piece with the thermostat and plug attached, so they do take up a bit of room.