This is the oficial extension, useful to prevent a modified JS attack:

https://chrome.google.com/webstore/detail/my-wallet/djjkppdfofjnpcbnkkangbhanjdnoocd

There are other exchanges you can try, like Bitstamp or BTC-e.

Here you have some of them:

https://en.bitcoin.it/wiki/Buying_bitcoins#Major_Exchanges

In my case, the SEPA transfer was pretty fast. I did on a thursday, my bank office confirmed it on friday and the next monday the money was on Bitstamp.

Now I have a pending withdrawal with them that is taking a little more...

In this thread you can read some experiences from forum members:

https://bitcointalk.org/index.php?topic=78007.0

And you can see some alternatives to Conabul here:

https://en.bitcoin.it/wiki/Trade#Precious_.26_Base_Metals.2FCoins

1st one, then.