Glympse is a great way to share your location

Seems like a promising app. I've installed it on my 3G and should say it runs quite slowly. As Alex said above, it "draws" on the map even though I have not moved. Surely a 3G GPS limitation.
It'd be far more useful for the app to give the option for the recipient to see the sender's location in Google Maps on his/her device so that the recipient's location is also displayed. For instance, if one or both users is in an unfamiliar neighborhood, the recipient may not know where s/he is in relation to the sender.

How well might this work on iOS devices which lack GPS or cell hardware?

If the GPS hardware isn't present, Location Services can approximate, which might be good enough to determine with an acceptable margin of error whether somebody is at one of several common locations, assuming those locations have WiFi; say home, work, school, and Starbucks. :-)

If the cell hardware isn't there, Glympse wouldn't be good for tracking people in transit, but that wouldn't stop it from being useful for knowing when they've arrived, assuming their destination has WiFi.

Is there anything like this that notifies someone when you reach a destination.

Say I hop on the train, set up a notification and a destination and when I reach that spot it sends an alert or text to someone?

oops, also:

Overall, pretty cool and very handy if you have friends that insist on texting you every 5 minutes "Where are you? How far away are you???

Been testing this out for a couple of weeks on my 3G. I had a friend with a Droid phone get it and we have been using it. So far I like it but there are some quirks with the old 3G.

On the 3G if you close the app next time you open it, it doesn't remember the last one that you were watching. I had to re-type the code every time (i couldn't seem to find a History or anything).

Also, the trace on the 3G gets pretty weird, it was drawing triangles and weird routes that I didn't actually take. I think that is more the issue with the 3G GPS.

Finally, it would be nice if when you open Glympse it automatically finds invites so you don't have to type in codes. That could be more the fault of the sender though, I need more time on the app.

I really disliked Glympse. I asked my girlfriend to install it on her ipad when she took a cross country trip last year. It doesn't send a Google Maps link. It sends a link to Glympse which wraps a frame around the google maps location. You're trapped within the glympse frame, can't drag and scroll like in normal google maps, can't use all the normal google maps functions. Also, if the glympse website ever goes down, you'd be at its mercy. (This never happened but it was slow to load a few times.)

I guess some people on here like it, but I asked her to uninstall it.

harry potter...life imitates art...

I LOVE Glympse! I use it every day when commuting so simple, and my friend doesn't even need the app to follow me...

actually, in the Glympse App Store page it says:

"• On iOS4 devices that support background apps (iPhone 3Gs and 4, IPod Touch 3rd gen), Glympse will now share your location while running in the background."

and also, while i'm sure Nearby is also a great app, Glympse doesn't require the recipient to sign up to anything:

"Glympse sends a link with your ongoing location to anyone via Email, SMS, Facebook, or Twitter. Best or all, the recipient doesn't need any
special software to be able to see your location. They get a link that shows your real ·time position, and optionally your speed, a message, a destination, and your ETA."

sounds fairly simple and unobtrusive to me.

I use this all the time, great app. It does indeed update while in the background or with the device sleeping, that's usually how I use it.