Stocks Direct From Company

Question about my associate stock purchase plan?
Can someone please put this in some form of understandable english:
Associates may purchase from $2 to $1,000 in stock per pay period through payroll deductions ($1 to $500 for Associates in weekly payroll states).
Company matches 15cents for every $1, up to first $1,800 in Associate stock purchase, per Plan year.
Associates may sell stock for as little as $20 per transaction and 5cents per share.
Associate may purchase up to $125,000 in stock through payroll deductions and direct puerchases from EquirServe, a Computershare company.
I’d like to know what this means in a nutshell and would it be worth doing and how much would be smart to deducte from my payroll for this stock plan? Also when can I get the money from the stock? Or is it something I have to wait til I’m retired for?
This is for the Wal-Mart stock plan.
the company will match your contribution up to 1500 a week….with 15 %…if you put in 100, they will put in 15…usually a good Idea to buy stock….depends on how long your going to work there…
your probally not going to buy 1000 a week of stock…if you quit, you can take it with you….may have early withdrawl penalty….
usually @ 20 % of you gross pay is a good ammount to invest with….If you can afford it…
Investment Advice : About Direct Stock Purchase Companies