Flight school in San Diego for instrument and multi-engine ratings

[DiamondC]

Can anyone recommend a flight school in San Diego for my instrument rating and multi-engine rating (accelerated training)?

Some of the ones on my shortlist are below but I don't know anyone who has been to them. Any comments - positive or negative - would be welcome!
- American Aviation Academy (http://flyaaa.com/)
- Coast Flight Training (http://iflycoast.com/)
- Powers Performance Aviation (www.flyppa.com)
- Learn to Fly San Diego (www.ltfsd.com)

I'm an international student so it needs to be one that can sponsor an M1 visa.

Thanks for your help!