I have used dozens of sat nav apps over the years on smartphones but have never found a great one for BlackBerry, until now! Taking all the others into consideration there are two main things I look for when deciding if the app is for me or not. The first is ease of use and the second is how aesthetic it is. Maybe the latter of the two is not as important for everyone but I'm kind of fussy and like things to look pretty.
One thing to remember about Telmap Navigator is that the maps are not stored on your device but downloaded as required, so if you have no network coverage you may run into problems. On the upside this means that the app won't take up a load of space on your BlackBerry. Luckily for Telmap Navigator both my requirements have been fulfilled and I'm as happy using Telmap on the BlackBerry as I have been using Tom Tom or CoPilot on iOS and Android.