In case anyone else is having a similar dilemma regarding computer choice, I thought I'd share my experience.

I now have a Wahoo Tickr HRM, Blue SC speed and cadence sensor and 2 head units; a RFLKT and a Cateye Padrone Smart+. I can send either head unit back for a refund, so may as well test both.

Firstly, the dual ANT+/BTLE signals of the Wahoo sensors is a great plus in my opinion and they work seamlessly in both, so no regrets buying them. My observations on the head units are as follows:-

RFLKT

• It takes a while to set up
• The only viable software (on Android) is Wahoo's own. I couldn't get RideWithGPS to work
• The screen is big and clarity is good, although the buttons are quite stiff to press
• The screen designer is awesome!
• Why couldn't Wahoo include a 'proper' out front mount (ie. centered at the front of the stem)?
• No 'pacing arrow'

The one negative for me is the messing around at the start of a ride waiting for sensors to 'pair', which can sometimes take a while, although this is partly because I run 2 apps, Wahoo's Fitness app to send data to the RFLKT and IPBike for gathering detailed data to upload to Strava.

Overall, though, despite reservations about dropouts, losing connection etc, the RFLKT has worked flawlessly once out on the road.

Cateye

• Also takes a while to set up
• Connects with Wahoo's sensors (BTLE only) no problem
• Only works with Cateye's app
• Screen is big and clear and general ergonomics are better than RFLKT
• Works perfectly in both modes, but 'Sensor Direct' offers something the RFLKT doesn't (it still records your ride even if your phone dies or you're in a race and can't take a phone)
• In either mode, shows a pacing arrow (whether you are currently above or below your trip average speed). I have used this for 20 years on Cateye computers and find it invaluable

All in all, there isn't much to choose between them. If I could 'reflect' the data from IPBike on my Samsung S6 to any head unit, that would be the deciding factor, but as I can't, I'm left to choose using the above observations. If I use 'Sensor Direct' on the Cateye, then it will be a simpler process to set off on a ride and this may be the deciding factor.

To conclude, you can't really go wrong with either unit, it may just come down to price in the end or which app you prefer. From what I've learned, Wahoo works more smoothly with iOS than Android and you have the option of a great iOS app called Cyclemeter which isn't available on Android. Fortunately, us Android users are well-served by an amazing app called IPBike, although you then need another app to send data to a head unit.