I got one of these recently. I will probably only use it with a DSLR - hoping it will work well with a telescope is probably wishful thinking. First impressions are good. Yes, it does need a good tripod and the polarfinder light attachment is a bit iffy. You can't use it when the optional dovetail L bracket is in place and as pointed out, putting the DSLR on is going to alter any polar setup already done. I got round this by shining a torch down the finderscope and will probably get a red LED on a wire mounted.
My only test was over 15 minutes before cloud was too heavy but it showed very little drift. The lens was short - 14mm and it would probably take huge error to show up at this level.
The image shows the first and last image over 30 minutes - the stars are in the same position.