Beside having quickly answered to the request for an additional item (that by inadvertence was not delivered and required a Paypal claim to do so), the seller is not answering requests for information about the product (i.e. Will any Teensy 3.6 GND and 3,3V able to provide sufficient current to the module?) and to provide a correct invoice.
I bought the CAN32 hoping that it would be an easy way to log CAN data using Arduino. Unfortunately, there is no schematic for this board or other documentation, which caused me to spend an entire weekend trying to get the CAN functionality to work. The problem was that the CAN transceiver Rs pin (mode select) was connected to pin 27 (IO16) on the ESP-WROOM-32 module and needed to be driven low, and the Arduino example code that the product page links to does not do this. Very disappointed in the lack of simple documentation or working example code, I should not have to reverse engineer the product in order to be able to use it.
Bought an TinyTracker GPS/GSM/CAN for Teensy 3.1/3.2 after a lot of struggle I got it work and out of nothing it stopped working. After a lot of hassle I got in contact with Paul and we negotiated that I send the complete(!! The Teensy+TinyTracker, Gyro Addon, SD-Card addon (Worth; €20+€95+€23+€8+Shipping back to Czech Republic = >€170 ) unit back. So I send my complete Teensy (€170) back to Czech Republic. Paul confirmed 28 of april 2017 he received the unit and also mailed me he was working on it (if it were any problem he de-soldered everything). After this last message there's an complete radio silence for about 7 months. In those 7 month I posted 7 messages on the Forum and all without response of Paul.
I feel really ripped off !!
Reading other reviews about lack of communication, order/shipping updates I would advice everybody(!!) to not buy at Fusion!
I have not used the switches yet (I plan to revise after using them). But the initial impressions are fantastic. They seem solid and nicely build. The shipping took a little more than 6 weeks and when I attempt to contact the seller I was unable so I contacted tindie and they contacted the seller. I never got a return message from the seller but eventually my package arrived. In summary the switches seem quite good and worth buying, if you can wait for the shipping, but don't expect to be able to contact the seller if you have issues.
Cool product, good quality but shipping&communication not great. Seller didn't communicate so I had to open Paypal-case (with Tindie as 3rd party) and then the product was shipped (almost 2 weeks after payment). Couldn't find any documentation so it took some trial&error to find the correct I2C configuration. I used Kris Winer's great example (https://github.com/kriswiner/MPU-9250/blob/master/MPU9250_MS5637_AHRS_t3.ino) to get started. Beware, you need to change all "Wire" to "Wire1" and I2C PINs to 'I2C_PINS_29_30' (SCL1&SDA1) and set the interrupt pin to 31.