I had heard horror stories about TRENDnet rebates, but jumped on two different deals for two different routers in April. This weekend, I got email confirmations for the two rebates. One was denied because of missing UPC bar code (a total lie). The other was valid and a check is promissed in July.
If the valid rebate's check is actually mailed in July, that will be a 3-month turnaround, which is way on the long side for many people. For the "invalid" rebate, I called back about the "missing bar code" and gave it to them over the phone. They warned me that it may take a while, because it is technically a new rebate submission. So, I may be looking at another 3-month wait on top of the 6 weeks I have already waited.
The bottom line, I would still jump on this deal in a heartbeat if I had a Fry's nearby, but make sure you have copies of everything you send.