It may very well fail -- but giving up would certainly ensure that it fails. The important part is that there is a significant response for the "yes" side; it must be recognized there is a high degree of dissatisfaction, since the current system is a farce. The 2001 election was an excellent illustration of how our current system (FPTP) isn't exactly fair:
Liberal
916,888 votes
57.62% of popular vote
seats 77
NDP
343,156 votes
21.56% of popular vote
seats 2
Greens
197,231 votes
12.39% of popular vote
seats 0
Unity; 51,426; 3.23%
Marijuana; 51,206; 3.22%
Other; 31,399; 1.98%
77/79 seats = 97.4%, with only 57.62% of the popular vote.
For those who don't want to do any reading, here's how the ridings in BC would likely be arranged:
http://bc.demochoice.org Independents and many of the smaller parties are missing from that page, but it still a gives a good idea of how many seats would be available in your riding, and what the ballot would look like. If you'd like to try a sample ballot, and walk through the counting process,
http://www.demochoice.org/dcballot.php?poll=BCSTV is a better indication of how the system works. There are over 1300 votes so far, making it more accurate, but the riding is fictitious and the candidates are the party leaders, etc. Note: if there aren't many votes, only the count summary comes up; click "all results" for the full counting process.
On proportionality:
In STV, ridings would be combined thus taking advantage of greater proportionality. When only one seat is being elected, you generally need 30-50% support to get elected. By electing several people on the same ballot, the threshold drops allowing the seats in a riding to better reflect the distribution of votes, not only the "majority". In theory, the support required for the number of seats (approximately):
1 - 50.1%
2 - 33.4%
3 - 25.1%
4 - 20.1%
5 - 16.8%
6 - 14.4%
7 - 12.6%
In practice, this is lower due to vote splitting. Under STV, vote splitting does not occur; when a candidate does not have enough support to be elected, he/she is eliminated and those votes are recounted and attributed to the voters' next choices.
On counting:
There are two mechanisms in the counting process:
1. Eliminate the candidate with the least number of votes, and redistribute those votes to the voters' next choices (at full value).
2. If a candidate exceeds the quota/threshold, he/she is elected. All the votes for that candidate are scaled down appropriately, and redistributed to the remaining candidates. For example:
quota = 1000 votes
# of votes for candidate A = 1500 votes
Each vote for candidate A will be scaled down to two-thirds.
(1500 x 0.6666 = 1000)
The next choices of those votes will each be worth one-third of a vote.
In other words, the excess votes are redistributed, taking all the voters' next choices into account.
On the ballot:
You rank your preferences 1,2,3... Your vote always stays with your highest candidate who is still in the running; you can rank candidates you don't like low in the preferences (#14, etc) -- you aren't voting for them, unless every single candidate above him/her has been elected or eliminated. You don't have to rank candidates you don't like, but it is a good idea -- otherwise you're saying "i don't care, let the other votes decide". If you rank too few candidates, your vote will be wasted if all your choices are eliminated.
There are lots of websites on STV. There are pros and cons, but watch out: some of the "yes" side paints things very rosy (there are cons, ie: greater geographical area to cover for mlas), and some of the "no" side flat-out lies or ignores important facts contrary to their arguments. It seems a campaign of confusion for some, so take everything with a grain of salt and decide for yourself.
Here's a collection of resources:
http://canadianleaders.abctheorists.com ... cle&sid=82