I use the Mini-Trekker and love it to bits.
The only thing you will find annoying is that the tripod probably won't fit unless it is a 'mini' model for travelling. There are no loops or clips to clip it to the outside either.
Manfrottos usually have a convenient clip to attach a shoulder strap somewhere so when travelling I usually:
a) Carry my Lowepro on my back with all camera gear in.
b) Pack the tripod in my cargo bag.
Some good deals on Lowepros on eBay at the moment.