If you're using the same lubricant for everything you're doing, then you're definitely doing it wrong. When it comes to toys, try a lubricant that's water based, like Yes's organic option. Silicon-based lubes break down silicon toys, literally disintegrating them. That isn't great for your toys, or whatever else that residue might be rubbing off in/on/etc.
The size of the toy itself is something you should really consider in any situation. If you want to carry it around with you or travel with it, you are going to go for a different model than when you just want to use it indoors. Also, if you don’t have enough storage space, or want to keep it hidden from your children, wife or even parents then the size is something that comes into play here too!
In manual mode, the Launch simply operates as an up-and-down pump for you to sit back and enjoy while you hold it over your lap. It's so large that it requires two-handed operation, and there are capacitive touch sensors where your thumbs are naturally designed to fall. The sensors on the left control the speed of the stroke, up to 180 thrusts a minute, while the right controls each stroke's length.
"Voltage was needed to ensure enough force was delivered to smoothly cycle the head when it was in active use," the guy behind Arlan Robotics writes. "The force needed to be just enough but not too great to risk injury. There was enough latency in the system so that if required the product could be stopped with ease just by applying extra pressure on the head."