I've no experience with other brokerage houses in regards to rights issue, but so far Standard Chartered has offered a pleasant (though not perfect) experience.
You can check out this blog post for the pros and cons of SC in relation to rights issue.
After reading up on KPO's blog post and other posts, I've come to realize some interesting aspects of a rights issue.
Hack #1: Sell your rights and apply for excess rights
Procedure:
Sell your rights on the market - Get free cash
You apply (call SCB Hotline) for excess rights and request for NO odd lots given to you. (yay to no commission fee)
Cross your fingers and hope you get the ballot.
Note
Selling of rights in the open market will incur commission fees.
Application of excess rights constitutes to exercising them as well, provided you have sufficient cash balance.
Hack #2: Buy rights to lower ......