Sound+Sleep SE High Fidelity Sleep Sound Machine

The first 2 units had electrical malfunctions out of the box... Feedback sounds from the speaker, on/off button not working unless the unit was unplugged then plugged back in, unit turned on, no sound from speaker. Both times I emailed Customer Support and they quickly agree to replace the unit. I'm currently awaiting the delivery of unit #3. Travel? Possibly. The unit is 6.5 inches wide, 5.5 inches deep and 4.5 inches tall. Sound quality? Good, the recording loops are virtually seamless. Number of sound selections? 11 realistic sound categories, or high/ low fan loops or white /brown/pink noise loops. Each category has 4 enhancements from which to choose. (eg rainfall, rainfall w/wind & light thunder, rainfall w/more wind & louder thunder etc) Timer? Yes or you can choose continuous play. Adaptive volume? Yes or you can opt to keep the sound at one level. Only one criticism of a particular sound selection: OCEAN has a LOT of base... think BIG angry waves on a beach. You can make the waves sound even bigger (as if a storm were offshore) or add birds/seals/buoys or add foghorns to the birds etc. I've heard better ocean sounds on phone apps...I'm disappointed they didn't start with more treble: lapping lagoon waves, waves on a pebble beach then ultimately add more base to emulate big angry waves on a beach. There is no way to change the sounds other than what I've already mentioned. If they ever decide to alter the ocean category, I'd have to buy another machine. Oh well, dems da breaks. I'll update this review after I receive and use unit #3. OK, unit #3 arrived today. It's operating perfectly. No feedback sounds, no bzzt sound when you plug it in, on/off button works flawlessly. Even the sound loops are better. For example, the ocean category isn't super base sounding as on the first two machines. Moral of the story: if at first, you don't succeed... Keep contacting customer service!