I bought this very cheap Blues Overdrive by Cuvave on eBay and Im impressed by how its built and the versatility and sound. Apart from the 9V DC power, this unit has got a USB option. Im not quite sure if it's mini or micro USB because it doesn't say on the manual. Three knobs which are level, gain and tone. There are tons of settings to play around. What I like the most is that it feels that it is durable and it's tiny. You can easily start to build a mini pedalboard that is lightweight and very portable.
To put it to the test, I did a comparison video between this Cuvave Overdrive Blues and the Boss Blues Driver BD2. To be honest, it didn't come close to the Boss but, it has its own character and tone which I really like. In terms of price as well, it's really far. Because I only bought it for £15 free delivery versus Boss which is being sold at £75.
You'll be the judge guys if you want to buy this pedal.