The one operated by someone with knowledge and care for a good result!

The two most effective hair removal lasers are the Alexandrite laser at 755nm and the Diode laser at 808. We got both in our practice. This is established in many papers and in a classic dermatology textbook:

Chapter 137 page. 2105 - Laser therapy (by Alexiades-Armenaka MR, Dover JS and Arndt KA) in Dermatology 2nd ed. Bologna, Jorizzo, Rapini. Mosby 2008

Naturally it is important to note that a device on its own does nothing. Appropriate coverage and the parameters used are crucial in terms of safety and effectiveness. For this reason the person operating the device is the most important factor. 

Your own body through its own fat!

In any filler we look firstly for safety, secondly for a natural result and thirdly for a long lasting result. Although each filler has its own characteristics, using these simple criteria, the simple answer is that your own fat is the best filler for you. However, the process of lipofilling is time consuming compared to hyaluronic acid. Ones fat can never cause any reactions, the results are natural and it lasts for years.  

The short answer is no and sometimes it is required to remove a 'mole' which in reality is a cancer that may lead to metastasis.

Mole is a lesion where we encounter more melanocytes than normal. Melanocytes are cells containing melanin which gives a dark colour. Even an incomplete removal of such a benign lesion is not a problem since what remains is benign. A complete removal, of course, leaves nothing behind to cause any trouble in the future. 

In contrast, a melanoma is a serious skin cancer that starts from melanocytes. Most melanomas start as melanomas right from the start, while less than 30% of melanomas is though to have evolved from an initial mole that changed at some point. The sooner you remove such a lesion, the less chance of it spreading and the better the prognosis.