I have one, it seems to dry in about the same time as a dryer with an outlet which we have at work.
Have you bought thost two little spikey balls that u put in the dryer to help the drying process, I bought mine in the US very cheaply but I think places like Lakeland sell them.
Maybe, but of course I dont know, u are putting too many clothes in at once ? Good luck anyway.
I`ve had one for a couple of years now as I couldn`t have a vent to the outside for the ordinary type. Just great as far as I`m concerned, but do make sure that you clean the condenser unit regularly (and the fuzz filter too) as that can make a difference to the performance of the dryer.