Ok, here are my findings. I installed igo8 on my device and was having a gps lock issue (whick xps already knows about). I tried using my google maps as well, I was getting a lock, but, between 800-1000 meters to my actual location! Earlier that same day, I installed the new MS marketplace to my device and I am almost 100% sure that's what was causing the issue. I have not since installed the MS Marketplace and have had no no issues (with Google Maps or igo
. However, the other, more minor issue I'm having is that, if you don't have you light sensor set to automatic, the screen dims to the setting in igo8 and I have noticed that even if your settings in igo8 are to the max, its still dimmer than the actual phone settings, so, leave your light sensor enabled! And last, but, not least. The system volume of the phone ALWAYS gos down the 1/4 after using the igo8 software, again, even if you have the igo8 settings to the max!
Apart from these small issues (Volume and backlight) the software works great, looks great (in portrait and landscape) and I have absolutely no lag, what-so-ever! Thanks for the release xps and I hope my input helps for future possible tweaks and/or trouble shooting!
P.S. The TTS is also working great on my device.