kiwi..?
 

so I want to pull the trigger on a gauge but have no idea what way to go. The kiwi looks great and seems to have some nice features but an old review mentioned some features not being that great. I haven't seen any more recent reviews for it. What do people recommend? Thank you.

Kiwi doesn't get a great review, here in the UK, but it is cheap. I like my ScanGauge E, which is all I have experience of.

What problems are people having with the kiwi?

The main thing for UK users is it only works in US gallons, a big no no here. But also of concern, is the difficulty programming and the fact that the instantaneous read out is just too instantaneous, updating so fast it is difficult to read.
As I said earlier, I have no personal experience of the device, using a ScanGauge E myself. ScanGauge II seems even better, from what I have read, allowing four displays instead of just the two on the E.