I have had milenco aero and now grand aero and both have been excellent.
Make sure you buy the alternative pads for your vehicle, I have the vw v-blocks which were great on my Tiguan and now on my Santa Fe.
As for which glass to have, I chose convex and I find them fine
Thanks all for your suggestions I will do some research and decide. Van should have been delivered yesterday after a 2 week wait but the PDI has thrown up some issues (only minor) but need sorting before I accept it, hopefully should be here middle of next week. cant wait !!