Just never ask the sales staff for advice.
There's only one store where I live that sells Apple products (other than iPODS) so when I'm in the UK I always go to John Lewis to check the Apple display. Some of the advice the staff have spouted while I,ve been there has been amazing. 21st September I listened to staff tell a women looking for a computer for her son for college that this was the new 17" iMac (a 20" anglepoise G4 iMac) but they also do a 20" like this one, a 20" cinema display right next to the '17"' display the same size.
She then asked if they did laptops and the salesman said they did and showed a row of 17" & 12" PBooks and 14" & 12" iBooks claiming they were all PBooks but that they also did some iBooks that were similar but smaller!!??
The women then said whatever she bought had to run MS Office and would the Mac do this.
No, but Apple's all came with Apple Works which is the same thing!
He then showed her round the HP laptops.
Once he'd gone I told the women to check out the Apple online store for the cram and jam deal and get education prices on that and the MS Office. She left thanking me and I imagine her son is much happier for my intervention.
Another member of staff, same store 6months earlier assured a customer that the differance between the HP Ipaq they were comparing to a Zire71 (or72) was while the Zire had a camera the Ipaq was also a GSM phone????