Hi All,
I am looking into getting another router after many years. I have started to read up on DD-WRT and this sounds very interesting. Has anyone had good luck with this flash? Or maybe even bad luck?

I LIKE the idea of have a deeper control of network traffic and this sounds like a cheap way to go.

Thanks for any remarks
find it on amazon Yes, DD-WRT will give you more control.
Bear in mind  DD-WRT is a OPEN project that is subject to change and the documentation requires cafe full daring. Even so, many, like myself, prefer it.

A number of new router models come with DD-WRT already in the firmware. You can find a list at Amazon, or Newegg or your favorite vendor.
Or Google it. Try Best DD-WRT ROUTERS.
Here is a nice one:
Most Popular & Best DD-WRT Wireless Routers of 2014

Have fun! 
I switched to DD-WRT a few years ago and love it.

There were pros and cons to its use though.

Pros = Getting features of a higher end product such as bandwidth controls so that one user downloading wouldnt bring down a slower broadband connection where bandwidth is limited. I have VoIP Vonage Phone and I am able to allocate a slice of bandwidth for the phone so that the phone doesnt act up or cut out when a download and or streaming is happening. Vonage gets priority of service when  active.

Cons = The routers status LED's can now be misleading. The ports use to be solid green and blink green when active under the DLink original firmware. After DD-WRT the status LED's other than power are strange in that you get a solid green when connected, but instead of a BLINKING green you get a completely out LED when there is traffic. This caused me to chase my tail once when I had an issue and I was expecting the original flicker or blink of the LED when there was traffic vs it going completely out.

I bought a refurb D-Link for $19 through Newegg about 3 years ago and flashed it to DD-WRT and it has been bullet proof as for as its operation. DD-WRT turned a $20 router into the features of a more expensive router.

As far as ease of use... DD-WRT requires some PATIENCE and skills in knowing what you are doing. Its not as easily configurable as a OEM firmware user interface with far less features and generally has a wizard to step you through configuration. But its not very difficult to figure out if you have patience and do some research on google when you find something that your unsure of. Unless a newer flash of DD-WRT contains a wizard, one doesnt exist and so you have to manually go in and configure everything that you want to enable or disable etc.

If buying a wireless router with DD-WRT in mind, I would first check to make sure that the model and version of that model is supported before buying it. Its mostly older model wireless routers or brand new models that firmware has yet to be created for that are problems for DD-WRT. The older routers it usually comes down to the fact that they lack the flash rom capacity to take a 29MB flash. My router for example has a 32MB flash rom in it and DD-WRT shows the free capacity and 29MB in use, so its a tight install on my refurb router, but its operationally as a router flawless with exception to the odd LED status change in behavior. You also learn other stuff about your router of choice such as its processor speed in which my router runs at 350Mhz for its processor. It also has all sorts of statistics to look at and log if you want etc.