In my opinion, the IGrow Laser is one of the best all around at-home laser devices for hair regrowth. Apira Science, LLC has done a very good job at marketing the device with the real potential of the device and the correct way to use it.
For the money, the IGrow Laser is best laser you can purchase unless you have very fine blond hair. The Igrow Laser is cost effective and is well made. Their customer support is also fantastic.
The Igrow laser has received their 510K FDA Market Clearance recently which makes them a better purchase against the Hairmax Lasercomb devices.
If you have blond hair though, it will not be strong enough. You will need to purchase the LaserCap that is about 10 times as powerful. People with very light hair need more laser energy to get a result. This is due to blond hair reflecting light versus black hair that will attract light. If you have black to light brown hair, the Igrow Laser device will work well.
I do however recommend that every laser unit be used with the right product to get the best result for your individual situation. At Evolution Hair Loss Institute I have put together multiple Igrow packages for different situations.