There are people who are still waiting after weeks for they're $/BTCs. Anyone who uses BI right now takes the chance they will be waiting weeks also.
I have had over 6 successful transactions since 6/12/13. There are problems with the system of course because it's in BETA. Anyone who can read BETA on the site should realize that the interface or system could have some bugs. If you choose not to use BitInstant based on single experiences, then that is your choice. But it works MOST of the time and if there is an issue it is usually handled pretty quickly. Waiting on a Coinapult email for the deposit I made this morning still, but sometimes Coinapult is slow.