We did the Leicester ring in 2006 in a fortnight in the Hottest weather I have ever boated in, it was an easy two weeks which included doing the Asby Canal, the trip down to Coventry Basin and a side trip to Calcutt. Not my favourite ring but enjoyable all the same. Also worth doing the Welford and Market Harborough arms, Market Harborough if only for food shopping. Pubs in MH not great so we prefer stopping at Foxton which has a good selection
Have boated through and stoped in Leicester many times without a hint of trouble. Our usual stopping point is at Birstall just North of the centre. If you find the time visit the National space centre and adjacent pumping station museum which are next to Belgrave lock, taking the boat up the short arm below the lock was a highlight of the trip so long as you don't mind unprotected wiers!
The River Soar is a delight, the Plough at Normanton being my favorite watering hole, they also have a sister pub at Barrow, Kegworth has the worlds slowest Indian Restaurant.
Tim