Rejuvapen results for neck and face?

Yes, Rejuvapen is a wonderful treatment for overall smoothing of the skin. Helping also with fine lines, pores, texture and scars.

As far as skin tightening and sagging skin I feel that realistic expectations would be that it may help slightly. Depending on the severity those may be better addressed with Microneedling RF such as Profound.

Micro-needling of the skin is one of the fastest growing procedures in the aesthetic marketplace.  Many patients have experienced the benefits of making these small channels in the skin.  This device works by stimulating the regeneration of the skin which effectively improves the tone and texture, and can also tighten the skin.  In my evaluation of these devices, the Rejuvapen System is one of the better devices on the market for micro-needling.  Their needles and power levels have proven safe and effective in my clinic.One other important aspect of micro-needling is the combination of this treatment with topical application of platelet-rich plasma.  I love combining TruPRP treatments with micro-needling, both topically and injected. We have seen very good results with the combined treatment. Finally, Rejuvapen is one of the few micro-needling companies that offers products to put on the skin after the micro-needling has been completed.  One of these products available with Rejuvapen are  the OMNI line of growth factor products.  Many practices are using these products with micro-needling to try and achieve better results and faster recovery. 

Micro-needling motorized devices are basically the same.  Variables include the number of needles per head piece, the depth of needling and the speed setting.  Adding platelet rich plasma to the skin prior to the procedure should improve results.  Several sessions (usually more than two) are required to produce noticeable results albeit subtle. 
Micro-needling with or PRP treatments may result in mild improvement in fine lines, pigmentary changes and skin quality.  They do not produce skin tightening or reduction of significant wrinkles.
Please consult in person with an experienced Board Certified Plastic Surgeon prior to making treatment decisions.

The results with this device is subtle. You will not achieve dramatic changes, but many patients like it for an easy maintenance treatment. Multiple sessions are always more beneficial than single treatments.

The results from the Rejuvapen are modest. It normally takes
more than one treatment to see results. Periodic repeating of process once or twice a
year is needed as maintenance. It is not equivalent to laser
resurfacing.