I went in to exchange my not working Jarbra X10 and get a new bluetooth in exchange. There was 2 sales guys looking at Escort RD (Solo 2 and X50). They looked very puzzled with the customer looking on. I asked them do they need any help and what information on these RD's were they looking for? 1 on the sales guy's asked is the Solo 2 upgradeable? I said no but that X50 is. The customer asked is the X50 a good detector, I said very good its a Top 4 RD and then named the 4 top RD and told him he couldnt go wrong with the X50. I then told the customer about this site and it would help him out alot. After the customer paid and left the sales guys said thanks for the help, since I could see the relief in thier faces when I helped them close the sale. To the guy who bought the X50 and drives the white passat, enjoy your X50.